BUG/MAJOR: session: repair tcp-request connection rules

Since recent commit f79c817 (MAJOR: connection: add two new flags to
indicate readiness of control/transport) and the surrounding commits,
the session initialization has been slightly delayed and the control
layer of the connection is not yet initialized when processing the
rules.

We need to move that minimal initialization a bit above.

The bug was introduced with latest changes, no backport is needed.
BUILD: fix SUBVERS extraction in the Makefile

We'd rather skip any line containing "$Format" and not just those
beginning with it because SUBVERS starts with a dash and caused a
bad format to be reported.
BUILD: pattern: silence a warning about uninitialized value

Gcc 3.4 warns that mask may be used uninitialized in pattern.c. This
is wrong since it's used in the same condition as its assignment,
although it's not necessarily obvious for the compiler. Fix this by
initializing the value.

This was introduced by recent commit 01cdcd4a so no backport is needed.
BUILD: log: fix build warning on Solaris

The is* macros must not use a char on Solaris. Unsigned char is OK.
Casting char to int is wrong as well since we get a negative value.

  src/log.c: In function `parse_logformat_string':
  src/log.c:454: warning: subscript has type `char'
BUILD: dumpstats: fix build error on Solaris

Since the recent addition of map updates, haproxy does not build anymore
on Solaris because "s_addr" is a #define :

src/dumpstats.c: In function `stats_map_lookup':
src/dumpstats.c:4688: error: syntax error before '.' token
src/dumpstats.c:4781: error: `S_un' undeclared (first use in this function)
src/dumpstats.c:4781: error: (Each undeclared identifier is reported only once
src/dumpstats.c:4781: error: for each function it appears in.)
make: *** [src/dumpstats.o] Error 1

Simply rename the variable.
DOC: move option pgsql-check to the correct place

This one was not alphabetically sorted.
DOC: move option tcp-check to the proper place

It was not alphabetically sorted.
MINOR: connection: add simple functions to report connection readiness

conn_xprt_ready() reports if the transport layer is ready.
conn_ctrl_ready() reports if the control layer is ready.

The stream interface uses si_conn_ready() to report that the
underlying connection is ready. This will be used for connection
reuse in keep-alive mode.
MEDIUM: connection: centralize handling of nolinger in fd management

Right now we see many places doing their own setsockopt(SO_LINGER).
Better only do it just before the close() in fd_delete(). For this
we add a new flag on the file descriptor, indicating if it's safe or
not to linger. If not (eg: after a connect()), then the setsockopt()
call is automatically performed before a close().

The flag automatically turns to safe when receiving a read0.
OPTIM: http: set CF_READ_DONTWAIT on response message

strace shows a lot of EAGAIN on small response messages. This
is caused by the fact that the READ_DONTWAIT flag is not set
on response message, it's only there when we want to flush
pending data.

For small responses, it's a waste of CPU cycles to call recv()
for nothing since most of the time, everything we'll need will
be in the first response. Also, this will offer more opportunities
for using splice() to transfer data.
OPTIM: http: do not re-enable reading on client side while closing the server side

It's common to observe a an recv() call on the client side just after
the connect() to has been issued to the server side when running in
server close mode. The reason is that the whole request has been sent
and the shutw() has been queued in the channel, so the request message
switches to the MSG_CLOSED state, which didn't disable reading. Let's
do it now. That way the reading will only be re-enabled after the
response is transferred to the client. However if abortonclose is set,
we still leave it enabled.
MINOR: config: add option http-keep-alive

This new option enables HTTP keep-alive processing on the connections.
It can be overwritten by http-server-close, httpclose and forceclose.
Right now full-chain keep-alive is not yet implemented, but we need
the option to work on it. The doc will come later.
MEDIUM: connection: inform si_alloc_conn() whether existing conn is OK or not

When allocating a new connection, only the caller knows whether it's
acceptable to reuse the previous one or not. Let's pass this information
to si_alloc_conn() which will do the cleanup if the connection is not
acceptable.
MAJOR: stream-int: handle the connection reuse in si_connect()

This is the best place to reuse a connection. We centralize all
connection requests and we're at the best place to know exactly
what the current state of the underlying connection is. If the
connection is reused, we just enable polling for send() in order
to be able to emit the request.
MAJOR: http: add the keep-alive transition on the server side

When a connection to the server is complete, if the transaction
requests keep-alive mode, we don't shut the connection and we just
reinitialize the stream interface in order to be able to reuse the
connection afterwards.

Note that the server connection count is decremented, just like the
backend's, and that we still try to wake up waiters. But that makes
sense considering that we'll eventually be able to immediately pass
idle connections to waiters.
MAJOR: backend: enable connection reuse

This commit allows an existing server-side connection to be reused if
it matches the same target. Basic controls are performed ; right now
we do not allow to reuse a connection when dynamic source binding is
in use or when the destination address or port is dynamic (eg: proxy
mode). Later we'll have to also disable connection sharing when PROXY
protocol is being used or when non-idempotent requests are processed.
MINOR: http: add option prefer-last-server

When the load balancing algorithm in use is not deterministic, and a previous
request was sent to a server to which haproxy still holds a connection, it is
sometimes desirable that subsequent requests on a same session go to the same
server as much as possible. Note that this is different from persistence, as
we only indicate a preference which haproxy tries to apply without any form
of warranty. The real use is for keep-alive connections sent to servers. When
this option is used, haproxy will try to reuse the same connection that is
attached to the server instead of rebalancing to another server, causing a
close of the connection. This can make sense for static file servers. It does
not make much sense to use this in combination with hashing algorithms.
MEDIUM: http: do not report connection errors for second and further requests

In HTTP keep-alive, if we face a connection error to the server while sending
the request, the error should not be reported, and the client-side connection
should simply be closed, so that client knows it can retry. This can happen if
the server has too short a keep-alive timeout and quits at the same moment the
new request comes in.
[RELEASE] Released version 1.5-dev20

Released version 1.5-dev20 with the following main changes :
    - DOC: add missing options to the manpage
    - DOC: add manpage references to all system calls
    - DOC: update manpage reference to haproxy-en.txt
    - DOC: remove -s and -l options from the manpage
    - DOC: missing information for the "description" keyword
    - DOC: missing http-send-name-header keyword in keyword table
    - MINOR: tools: function my_memmem() to lookup binary contents
    - MEDIUM: checks: add send/expect tcp based check
    - MEDIUM: backend: Enhance hash-type directive with an algorithm options
    - MEDIUM: backend: Implement avalanche as a modifier of the hashing functions.
    - DOC: Documentation for hashing function, with test results.
    - BUG/MEDIUM: ssl: potential memory leak using verifyhost
    - BUILD: ssl: compilation issue with openssl v0.9.6.
    - BUG/MINOR: ssl: potential memory leaks using ssl_c_key_alg or ssl_c_sig_alg.
    - MINOR: ssl: optimization of verifyhost on wildcard certificates.
    - BUG/MINOR: ssl: verifyhost does not match empty strings on wildcard.
    - MINOR: ssl: Add statement 'verifyhost' to "server" statements
    - CLEANUP: session: remove event_accept() which was not used anymore
    - BUG/MINOR: deinit: free fdinfo while doing cleanup
    - DOC: minor typo fix in documentation
    - BUG/MEDIUM: server: set the macro for server's max weight SRV_UWGHT_MAX to SRV_UWGHT_RANGE
    - BUG/MINOR: use the same check condition for server as other algorithms
    - DOC: fix typo in comments
    - BUG/MINOR: deinit: free server map which is allocated in init_server_map()
    - CLEANUP: stream_interface: cleanup loop information in si_conn_send_loop()
    - MINOR: buffer: align the last output line of buffer_dump()
    - MINOR: buffer: align the last output line if there are less than 8 characters left
    - DOC: stick-table: modify the description
    - OPTIM: stream_interface: return directly if the connection flag CO_FL_ERROR has been set
    - CLEANUP: code style: use tabs to indent codes
    - DOC: checkcache: block responses with cacheable cookies
    - BUG/MINOR: check_config_validity: check the returned value of stktable_init()
    - MEDIUM: haproxy-systemd-wrapper: Use haproxy in same directory
    - MEDIUM: systemd-wrapper: Kill child processes when interrupted
    - LOW: systemd-wrapper: Write debug information to stdout
    - BUG/MINOR: http: fix "set-tos" not working in certain configurations
    - MEDIUM: http: add IPv6 support for "set-tos"
    - DOC: ssl: update build instructions to use new SSL_* variables
    - BUILD/MINOR: systemd: fix compiler warning about unused result
    - url32+src - like base32+src but whole url including parameters
    - BUG/MINOR: fix forcing fastinter in "on-error"
    - CLEANUP: Make parameters of srv_downtime and srv_getinter const
    - CLEANUP: Remove unused 'last_slowstart_change' field from struct peer
    - MEDIUM: Split up struct server's check element
    - MEDIUM: Move result element to struct check
    - MEDIUM: Paramatise functions over the check of a server
    - MEDIUM: cfgparse: Factor out check initialisation
    - MEDIUM: Add state to struct check
    - MEDIUM: Move health element to struct check
    - MEDIUM: Add helper for task creation for checks
    - MEDIUM: Add helper function for failed checks
    - MEDIUM: Log agent fail, stopped or down as info
    - MEDIUM: Remove option lb-agent-chk
    - MEDIUM: checks: Add supplementary agent checks
    - MEDIUM: Do not mark a server as down if the agent is unavailable
    - MEDIUM: Set rise and fall of agent checks to 1
    - MEDIUM: Add enable and disable agent unix socket commands
    - MEDIUM: Add DRAIN state and report it on the stats page
    - BUILD/MINOR: missing header file
    - CLEANUP: regex: Create regex_comp function that compiles regex using compilation options
    - CLEANUP: The function "regex_exec" needs the string length but in many case they expect null terminated char.
    - MINOR: http: some exported functions were not in the header file
    - MINOR: http: change url_decode to return the size of the decoded string.
    - BUILD/MINOR: missing header file
    - BUG/MEDIUM: sample: The function v4tov6 cannot support input and output overlap
    - BUG/MINOR: arg: fix error reporting for add-header/set-header sample fetch arguments
    - MINOR: sample: export the generic sample conversion parser
    - MINOR: sample: export sample_casts
    - MEDIUM: acl: use the fetch syntax 'fetch(args),conv(),conv()' into the ACL keyword
    - MINOR: stick-table: use smp_expr_output_type() to retrieve the output type of a "struct sample_expr"
    - MINOR: sample: provide the original sample_conv descriptor struct to the argument checker function.
    - MINOR: tools: Add a function to convert buffer to an ipv6 address
    - MINOR: acl: export acl arrays
    - MINOR: acl: Extract the pattern parsing and indexation from the "acl_read_patterns_from_file()" function
    - MINOR: acl: Extract the pattern matching function
    - MINOR: sample: Define new struct sample_storage
    - MEDIUM: acl: associate "struct sample_storage" to each "struct acl_pattern"
    - REORG: acl/pattern: extract pattern matching from the acl file and create pattern.c
    - MEDIUM: pattern: create pattern expression
    - MEDIUM: pattern: rename "acl" prefix to "pat"
    - MEDIUM: sample: let the cast functions set their output type
    - MINOR: sample: add a private field to the struct sample_conv
    - MINOR: map: Define map types
    - MEDIUM: sample: add the "map" converter
    - MEDIUM: http: The redirect strings follows the log format rules.
    - BUG/MINOR: acl: acl parser does not recognize empty converter list
    - BUG/MINOR: map: The map list was declared in the map.h file
    - MINOR: map: Cleanup the initialisation of map descriptors.
    - MEDIUM: map: merge identical maps
    - BUG/MEDIUM: pattern: Pattern node has type of "struct pat_idx_elt" in place of "struct eb_node"
    - BUG/MEDIUM: map: Bad map file parser
    - CLEANUP/MINOR: standard: use the system define INET6_ADDRSTRLEN in place of MAX_IP6_LEN
    - BUG/MEDIUM: sample: conversion from str to ipv6 may read data past end
    - MINOR: map: export map_get_reference() function
    - MINOR: pattern: Each pattern sets the expected input type
    - MEDIUM: acl: Last patch change the output type
    - MEDIUM: pattern: Extract the index process from the pat_parse_*() functions
    - MINOR: standard: The function parse_binary() can use preallocated buffer
    - MINOR: regex: Change the struct containing regex
    - MINOR: regex: Copy the original regex expression into string.
    - MINOR: pattern: add support for compiling patterns for lookups
    - MINOR: pattern: make the pattern matching function return a pointer to the matched element
    - MINOR: map: export parse output sample functions
    - MINOR: pattern: add function to lookup a specific entry in pattern list
    - MINOR: pattern/map: Each pattern must free the associated sample
    - MEDIUM: dumpstat: make the CLI parser understand the backslash as an escape char
    - MEDIUM: map: dynamic manipulation of maps
    - BUG/MEDIUM: unique_id: junk in log on empty unique_id
    - BUG/MINOR: log: junk at the end of syslog packet
    - MINOR: Makefile: provide cscope rule
    - DOC: compression: chunk are not compressed anymore
    - MEDIUM: session: disable lingering on the server when the client aborts
    - BUG/MEDIUM: prevent gcc from moving empty keywords lists into BSS
    - DOC: remove the comment saying that SSL certs are not checked on the server side
    - BUG: counters: third counter was not stored if others unset
    - BUG/MAJOR: http: don't emit the send-name-header when no server is available
    - BUG/MEDIUM: http: "option checkcache" fails with the no-cache header
    - BUG/MAJOR: http: sample prefetch code was not properly migrated
    - BUG/MEDIUM: splicing: fix abnormal CPU usage with splicing
    - BUG/MINOR: stream_interface: don't call chk_snd() on polled events
    - OPTIM: splicing: use splice() for the last block when relevant
    - MEDIUM: sample: handle comma-delimited converter list
    - MINOR: sample: fix sample_process handling of unstable data
    - CLEANUP: acl: move the 3 remaining sample fetches to samples.c
    - MINOR: sample: add a new "date" fetch to return the current date
    - MINOR: samples: add the http_date([<offset>]) sample converter.
    - DOC: minor improvements to the part on the stats socket.
    - MEDIUM: sample: systematically pass the keyword pointer to the keyword
    - MINOR: payload: split smp_fetch_rdp_cookie()
    - MINOR: counters: factor out smp_fetch_sc*_tracked
    - MINOR: counters: provide a generic function to retrieve a stkctr for sc* and src.
    - MEDIUM: counters: factor out smp_fetch_sc*_get_gpc0
    - MEDIUM: counters: factor out smp_fetch_sc*_gpc0_rate
    - MEDIUM: counters: factor out smp_fetch_sc*_inc_gpc0
    - MEDIUM: counters: factor out smp_fetch_sc*_clr_gpc0
    - MEDIUM: counters: factor out smp_fetch_sc*_conn_cnt
    - MEDIUM: counters: factor out smp_fetch_sc*_conn_rate
    - MEDIUM: counters: factor out smp_fetch_sc*_conn_cur
    - MEDIUM: counters: factor out smp_fetch_sc*_sess_cnt
    - MEDIUM: counters: factor out smp_fetch_sc*_sess_rate
    - MEDIUM: counters: factor out smp_fetch_sc*_http_req_cnt
    - MEDIUM: counters: factor out smp_fetch_sc*_http_req_rate
    - MEDIUM: counters: factor out smp_fetch_sc*_http_err_cnt
    - MEDIUM: counters: factor out smp_fetch_sc*_http_err_rate
    - MEDIUM: counters: factor out smp_fetch_sc*_kbytes_in
    - MEDIUM: counters: factor out smp_fetch_sc*_bytes_in_rate
    - MEDIUM: counters: factor out smp_fetch_sc*_kbytes_out
    - MEDIUM: counters: factor out smp_fetch_sc*_bytes_out_rate
    - MEDIUM: counters: factor out smp_fetch_sc*_trackers
    - MINOR: session: make the number of stick counter entries more configurable
    - MEDIUM: counters: support passing the counter number as a fetch argument
    - MEDIUM: counters: support looking up a key in an alternate table
    - MEDIUM: cli: adjust the method for feeding frequency counters in tables
    - MINOR: cli: make it possible to enter multiple values at once with "set table"
    - MINOR: payload: allow the payload sample fetches to retrieve arbitrary lengths
    - BUG/MINOR: cli: "clear table" must not kill entries that don't match condition
    - MINOR: ssl: use MAXPATHLEN instead of PATH_MAX
    - MINOR: config: warn when a server with no specific port uses rdp-cookie
    - BUG/MEDIUM: unique_id: HTTP request counter must be unique!
    - DOC: add a mention about the limited chunk size
    - BUG/MEDIUM: fix broken send_proxy on FreeBSD
    - MEDIUM: stick-tables: flush old entries upon soft-stop
    - MINOR: tcp: add new "close" action for tcp-response
    - MINOR: payload: provide the "res.len" fetch method
    - BUILD: add SSL_INC/SSL_LIB variables to force the path to openssl
    - MINOR: http: compute response time before processing headers
    - BUG/MINOR: acl: fix improper string size assignment in proxy argument
    - BUG/MEDIUM: http: accept full buffers on smp_prefetch_http
    - BUG/MINOR: acl: implicit arguments of ACL keywords were not properly resolved
    - BUG/MEDIUM: session: risk of crash on out of memory conditions
    - BUG/MINOR: peers: set the accept date in outgoing connections
    - BUG/MEDIUM: tcp: do not skip tracking rules on second pass
    - BUG/MEDIUM: acl: do not evaluate next terms after a miss
    - MINOR: acl: add a warning when an ACL keyword is used without any value
    - MINOR: tcp: don't use tick_add_ifset() when timeout is known to be set
    - BUG/MINOR: acl: remove patterns from the tree before freeing them
    - MEDIUM: backend: add support for the wt6 hash
    - OPTIM/MEDIUM: epoll: fuse active events into polled ones during polling changes
    - OPTIM/MINOR: mark the source address as already known on accept()
    - BUG/MINOR: stats: don't count tarpitted connections twice
    - CLEANUP: http: homogenize processing of denied req counter
    - CLEANUP: http: merge error handling for req* and http-request *
    - BUG/MEDIUM: http: fix possible parser crash when parsing erroneous "http-request redirect" rules
    - BUG/MINOR: http: fix build warning introduced with url32/url32_src
    - BUG/MEDIUM: checks: fix slow start regression after fix attempt
    - BUG/MAJOR: server: weight calculation fails for map-based algorithms
    - MINOR: stats: report correct throttling percentage for servers in slowstart
    - OPTIM: connection: fold the error handling with handshake handling
    - MINOR: peers: accept to learn strings of different lengths
    - BUG/MAJOR: fix haproxy crash when using server tracking instead of checks
    - BUG/MAJOR: check: fix haproxy crash during soft-stop/soft-start
    - BUG/MINOR: stats: do not report "via" on tracking servers in maintenance
    - BUG/MINOR: connection: fix typo in error message report
    - BUG/MINOR: backend: fix target address retrieval in transparent mode
    - BUG/MINOR: config: report the correct track-sc number in tcp-rules
    - BUG/MINOR: log: fix log-format parsing errors
    - DOC: add some information about how to apply converters to samples
    - MINOR: acl/pattern: use types different from int to clarify who does what.
    - MINOR: pattern: import acl_find_match_name() into pattern.h
    - MEDIUM: stick-tables: support automatic conversion from ipv4<->ipv6
    - MEDIUM: log-format: relax parsing of '%' followed by unsupported characters
    - BUG/MINOR: http: usual deinit stuff in last commit
    - BUILD: log: silent a warning about isblank() with latest patches
    - BUG/MEDIUM: checks: fix health check regression causing them to depend on declaration order
    - BUG/MEDIUM: checks: fix a long-standing issue with reporting connection errors
    - BUG/MINOR: checks: don't consider errno and use conn->err_code
    - BUG/MEDIUM: checks: also update the DRAIN state from the web interface
    - MINOR: stats: remove some confusion between the DRAIN state and NOLB
    - BUG/MINOR: tcp: check that no error is pending during a connect probe
    - BUG/MINOR: connection: check EINTR when sending a PROXY header
    - MEDIUM: connection: set the socket shutdown flags on socket errors
    - BUG/MEDIUM: acl: fix regression introduced by latest converters support
    - MINOR: connection: clear errno prior to checking for errors
    - BUG/MINOR: checks: do not trust errno in write event before any syscall
    - MEDIUM: checks: centralize error reporting
    - OPTIM: checks: don't poll on recv when using plain TCP connects
    - OPTIM: checks: avoid setting SO_LINGER twice
    - MINOR: tools: add a generic binary hex string parser
    - BUG/MEDIUM: checks: tcp-check: do not poll when there's nothing to send
    - BUG/MEDIUM: check: tcp-check might miss some outgoing data when socket buffers are full
    - BUG/MEDIUM: args: fix double free on error path in argument expression parser
    - BUG/MINOR: acl: fix sample expression error reporting
    - BUG/MINOR: checks: tcp-check actions are enums, not flags
    - MEDIUM: checks: make tcp-check perform multiple send() at once
    - BUG/MEDIUM: stick: completely remove the unused flag from the store entries
    - OPTIM: ebtree: pack the struct eb_node to avoid holes on 64-bit
    - BUG/MEDIUM: stick-tables: complete the latest fix about store-responses
    - CLEANUP: stream_interface: remove unused field err_loc
    - MEDIUM: stats: don't use conn->xprt_st anymore
    - MINOR: session: add a simple function to retrieve a session from a task
    - MEDIUM: stats: don't use conn->xprt_ctx anymore
    - MEDIUM: peers: don't rely on conn->xprt_ctx anymore
    - MINOR: http: prevent smp_fetch_url_{ip,port} from using si->conn
    - MINOR: connection: make it easier to emit proxy protocol for unknown addresses
    - MEDIUM: stats: prepare the HTTP stats I/O handler to support more states
    - MAJOR: stats: move the HTTP stats handling to its applet
    - MEDIUM: stats: move request argument processing to the final step
    - MEDIUM: session: detect applets from the session by using s->target
    - MAJOR: session: check for a connection to an applet in sess_prepare_conn_req()
    - MAJOR: session: pass applet return traffic through the response analysers
    - MEDIUM: stream-int: split the shutr/shutw functions between applet and conn
    - MINOR: stream-int: make the shutr/shutw functions void
    - MINOR: obj: provide a safe and an unsafe access to pointed objects
    - MINOR: connection: add a field to store an object type
    - MINOR: connection: always initialize conn->objt_type to OBJ_TYPE_CONN
    - MEDIUM: stream interface: move the peers' ptr into the applet context
    - MINOR: stream-interface: move the applet context to its own struct
    - MINOR: obj: introduce a new type appctx
    - MINOR: stream-int: rename ->applet to ->appctx
    - MINOR: stream-int: split si_prepare_embedded into si_prepare_none and si_prepare_applet
    - MINOR: stream-int: add a new pointer to the end point
    - MEDIUM: stream-interface: set the pointer to the applet into the applet context
    - MAJOR: stream interface: remove the ->release function pointer
    - MEDIUM: stream-int: make ->end point to the connection or the appctx
    - CLEANUP: stream-int: remove obsolete si_ctrl function
    - MAJOR: stream-int: stop using si->conn and use si->end instead
    - MEDIUM: stream-int: do not allocate a connection in parallel to applets
    - MEDIUM: session: attach incoming connection to target on embryonic sessions
    - MINOR: connection: add conn_init() to (re)initialize a connection
    - MINOR: checks: call conn_init() to properly initialize the connection.
    - MINOR: peers: make use of conn_init() to initialize the connection
    - MINOR: session: use conn_init() to initialize the connections
    - MINOR: http: use conn_init() to reinitialize the server connection
    - MEDIUM: connection: replace conn_prepare with conn_assign
    - MINOR: get rid of si_takeover_conn()
    - MINOR: connection: add conn_new() / conn_free()
    - MAJOR: connection: add two new flags to indicate readiness of control/transport
    - MINOR: stream-interface: introduce si_reset() and si_set_state()
    - MINOR: connection: reintroduce conn_prepare to set the protocol and transport
    - MINOR: connection: replace conn_assign with conn_attach
    - MEDIUM: stream-interface: introduce si_attach_conn to replace si_prepare_conn
    - MAJOR: stream interface: dynamically allocate the outgoing connection
    - MEDIUM: connection: move the send_proxy offset to the connection
    - MINOR: connection: check for send_proxy during the connect(), not the SI
    - MEDIUM: connection: merge the send_proxy and local_send_proxy calls
    - MEDIUM: stream-int: replace occurrences of si->appctx with si_appctx()
    - MEDIUM: stream-int: return the allocated appctx in stream_int_register_handler()
    - MAJOR: stream-interface: dynamically allocate the applet context
    - MEDIUM: session: automatically register the applet designated by the target
    - MEDIUM: stats: delay appctx initialization
    - CLEANUP: peers: use less confusing state/status code names
    - MEDIUM: peers: delay appctx initialization
    - MINOR: stats: provide some appctx information in "show sess all"
    - DIET/MINOR: obj: pack the obj_type enum to 8 bits
    - DIET/MINOR: connection: rearrange a few fields to save 8 bytes in the struct
    - DIET/MINOR: listener: rearrange a few fields in struct listener to save 16 bytes
    - DIET/MINOR: proxy: rearrange a few fields in struct proxy to save 16 bytes
    - DIET/MINOR: session: reduce the struct session size by 8 bytes
    - DIET/MINOR: stream-int: rearrange a few fields in struct stream_interface to save 8 bytes
    - DIET/MINOR: http: reduce the size of struct http_txn by 8 bytes
    - MINOR: http: switch the http state to an enum
    - MINOR: http: use an enum for the auth method in http_auth_data
    - DIET/MINOR: task: reduce struct task size by 8 bytes
    - MINOR: stream_interface: add reporting of ressouce allocation errors
    - MINOR: session: report lack of resources using the new stream-interface's error code
    - BUILD: simplify the date and version retrieval in the makefile
    - BUILD: prepare the makefile to skip format lines in SUBVERS and VERDATE
    - BUILD: use format tags in VERDATE and SUBVERS files
    - BUG/MEDIUM: channel:  bo_getline() must wait for \n until buffer is full
    - CLEANUP: check: server port is unsigned
    - BUG/MEDIUM: checks: agent doesn't get the response if server does not closes
    - MINOR: tools: buf2ip6 must not modify output on failure
    - MINOR: pattern: do not assign SMP_TYPES by default to patterns
    - MINOR: sample: make sample_parse_expr() use memprintf() to report parse errors
    - MINOR: arg: improve wording on error reporting
    - BUG/MEDIUM: sample: simplify and fix the argument parsing
    - MEDIUM: acl: fix the argument parser to let the lower layer report detailed errors
    - MEDIUM: acl: fix the initialization order of the ACL expression
    - CLEANUP: acl: remove useless blind copy-paste from sample converters
    - TESTS: add regression tests for ACL and sample expression parsers
    - BUILD: time: adapt the type of TV_ETERNITY to the local system
    - MINOR: chunks: allocate the trash chunks before parsing the config
    - BUILD: definitely silence some stupid GCC warnings
    - MINOR: chunks: always initialize the output chunk in get_trash_chunk()
    - MINOR: checks: improve handling of the servers tracking chain
    - REORG: checks: retrieve the check-specific defines from server.h to checks.h
    - MINOR: checks: use an enum instead of flags to report a check result
    - MINOR: checks: rename the state flags
    - MINOR: checks: replace state DISABLED with CONFIGURED and ENABLED
    - MINOR: checks: use check->state instead of srv->state & SRV_CHECKED
    - MINOR: checks: fix agent check interval computation
    - MINOR: checks: add a PAUSED state for the checks
    - MINOR: checks: create the agent tasks even when no check is configured
    - MINOR: checks: add a flag to indicate what check is an agent
    - MEDIUM: checks: enable agent checks even if health checks are disabled
    - BUG/MEDIUM: checks: ensure we can enable a server after boot
    - BUG/MEDIUM: checks: tracking servers must not inherit the MAINT flag
    - BUG/MAJOR: session: repair tcp-request connection rules
    - BUILD: fix SUBVERS extraction in the Makefile
    - BUILD: pattern: silence a warning about uninitialized value
    - BUILD: log: fix build warning on Solaris
    - BUILD: dumpstats: fix build error on Solaris
    - DOC: move option pgsql-check to the correct place
    - DOC: move option tcp-check to the proper place
    - MINOR: connection: add simple functions to report connection readiness
    - MEDIUM: connection: centralize handling of nolinger in fd management
    - OPTIM: http: set CF_READ_DONTWAIT on response message
    - OPTIM: http: do not re-enable reading on client side while closing the server side
    - MINOR: config: add option http-keep-alive
    - MEDIUM: connection: inform si_alloc_conn() whether existing conn is OK or not
    - MAJOR: stream-int: handle the connection reuse in si_connect()
    - MAJOR: http: add the keep-alive transition on the server side
    - MAJOR: backend: enable connection reuse
    - MINOR: http: add option prefer-last-server
    - MEDIUM: http: do not report connection errors for second and further requests