MINOR: http: add some debugging functions to pretty-print msg state names

The http_msg_state_str() function reports a string containing the name of
the state passed in argument. This helps while debugging.
BUG/MAJOR: stream_interface: read0 not always handled since dev12

The connection handling changed introduced in 1.5-dev12 introduced a
regression with commit 9bf9c14c. The issue is that the stream_sock_read0()
callback must update the channel flags to indicate that the side is closed
so that when process_session() is called, it can propagate the close to the
other side and terminate the session.

The issue only appears in HTTP tunnel mode. It's a bit tricky to trigger
the issue, it requires that the request channel is full with data flowing
from the client to the server and that both the response and the read0()
are received at once so that the flags are not updated, and that the HTTP
analyser switches to tunnel mode without being informed that the request
write side is closed. After that, process_session() does not know that the
connection has to be aborted either, and no more event appears on this side
where the connection stays here forever.

Many thanks to Igor at owind for testing several snapshots and for providing
valuable traces to reproduce and diagnose the issue!
DOC: documentation on http header capture is wrong

Since commit it is said that only the first value of the first occurrence
of a header is captured. This is wrong. Since the introduction of header
captures in version 1.1 in 2005 (commit e983144d), the WHOLE line of the
LAST occurrence has been captured and the behaviour has never changed.

At this time the doc was correct. The error was introduced in the new doc
in 1.3.14 in 2007 (commit 0ba27505).

So this fix should be backported to 1.4 and 1.3.
MINOR: http: allow the cookie capture size to be changed

Some users need more than 64 characters to log large cookies. The limit
was set to 63 characters (and not 64 as previously documented). Now it
is possible to change this using the global "tune.http.cookielen" setting
if required.
DOC: http header capture has not been limited in size for a long time

It's been documented for a very long time that captured HTTP headers
were limited to 64 characters, but this has not the case anymore since
1.3.11 in 2007 (commit cf7f320f), as they all use their own pool and
have no such limit anymore.

This fix should be backported to 1.4 and 1.3.
DOC: update readme with build methods for BSD

Suggest use of the GNU Makefile which is more featureful. Also explains
how to disable the shared SSL cache.
BUILD: silence a warning on Solaris about usage of isdigit()

On Solaris, isdigit() is a macro and it complains about the use of
a char instead of the int for the argument. Let's cast it to an int
to silence it.
MINOR: stats: report HTTP compression stats per frontend and per backend

It was a bit frustrating to have no idea about the bandwidth saved by
HTTP compression. Now we have per-frontend and per-backend stats. The
stats on the HTTP interface are shown in a hover title in the "bytes out"
column if at least something was fed to the compressor. 3 new columns
appeared in the CSV stats output.
[RELEASE] Released version 1.5-dev13

Released version 1.5-dev13 with the following main changes :
    - BUILD: fix build issue without USE_OPENSSL
    - BUILD: fix compilation error with DEBUG_FULL
    - DOC: ssl: remove prefer-server-ciphers documentation
    - DOC: ssl: surround keywords with quotes
    - DOC: fix minor typo on http-send-name-header
    - BUG/MEDIUM: acls using IPv6 subnets patterns incorrectly match IPs
    - BUG/MAJOR: fix a segfault on option http_proxy and url_ip acl
    - MEDIUM: http: accept IPv6 values with (s)hdr_ip acl
    - BUILD: report zlib support in haproxy -vv
    - DOC: compression: add some details and clean up the formatting
    - DOC: Change is_ssl acl to ssl_fc acl in example
    - DOC: make it clear what the HTTP request size is
    - MINOR: ssl: try to load Diffie-Hellman parameters from cert file
    - DOC: ssl: update 'crt' statement on 'bind' about Diffie-Hellman parameters loading
    - MINOR: ssl: add elliptic curve Diffie-Hellman support for ssl key generation
    - DOC: ssl: add 'ecdhe' statement on 'bind'
    - MEDIUM: ssl: add client certificate authentication support
    - DOC: ssl: add 'verify', 'cafile' and 'crlfile' statements on 'bind'
    - MINOR: ssl: add fetch and ACL 'client_crt' to test a client cert is present
    - DOC: ssl: add fetch and ACL 'client_cert'
    - MINOR: ssl: add ignore verify errors options
    - DOC: ssl: add 'ca-ignore-err' and 'crt-ignore-err' statements on 'bind'
    - MINOR: ssl: add fetch and ACL 'ssl_verify_result'
    - DOC: ssl: add fetch and ACL 'ssl_verify_result'
    - MINOR: ssl: add fetches and ACLs to return verify errors
    - DOC: ssl: add fetches and ACLs 'ssl_verify_crterr', 'ssl_verify_caerr', and 'ssl_verify_crterr_depth'
    - MINOR: ssl: disable shared memory and locks on session cache if nbproc == 1
    - MINOR: ssl: add build param USE_PRIVATE_CACHE to build cache without shared memory
    - MINOR: ssl : add statements 'notlsv11' and 'notlsv12' and rename 'notlsv1' to 'notlsv10'.
    - DOC: ssl : add statements 'notlsv11' and 'notlsv12' and rename 'notlsv1' to 'notlsv10'.
    - MEDIUM: config: authorize frontend and listen without bind.
    - MINOR: ssl: add statement 'no-tls-tickets' on bind to disable stateless session resumption
    - DOC: ssl: add 'no-tls-tickets' statement documentation.
    - BUG/MINOR: ssl: Fix CRL check was not enabled when crlfile was specified.
    - BUG/MINOR: build: Fix compilation issue on openssl 0.9.6 due to missing CRL feature.
    - BUG/MINOR: conf: Fix 'maxsslconn' statement error if built without OPENSSL.
    - BUG/MINOR: build: Fix failure with USE_OPENSSL=1 and USE_FUTEX=1 on archs i486 and i686.
    - MINOR: ssl: remove prefer-server-ciphers statement and set it as the default on ssl listeners.
    - BUG/MEDIUM: ssl: subsequent handshakes fail after server configuration changes
    - MINOR: ssl: add 'crt-base' and 'ca-base' global statements.
    - MEDIUM: conf: rename 'nosslv3' and 'notlsvXX' statements 'no-sslv3' and 'no-tlsvXX'.
    - MEDIUM: conf: rename 'cafile' and 'crlfile' statements 'ca-file' and 'crl-file'
    - MINOR: ssl: use bit fields to  store ssl options instead of one int each
    - MINOR: ssl: add 'force-sslv3' and 'force-tlsvXX' statements on bind.
    - MINOR: ssl: add 'force-sslv3' and 'force-tlsvXX' statements on server
    - MINOR: ssl: add defines LISTEN_DEFAULT_CIPHERS and CONNECT_DEFAULT_CIPHERS.
    - BUG/MINOR: ssl: Fix issue on server statements 'no-tls*' and 'no-sslv3'
    - MINOR: ssl: move ssl context init for servers from cfgparse.c to ssl_sock.c
    - MEDIUM: ssl: reject ssl server keywords in default-server statement
    - MINOR: ssl: add statement 'no-tls-tickets' on server side.
    - MINOR: ssl: add statements 'verify', 'ca-file' and 'crl-file' on servers.
    - DOC: Fix rename of options cafile and crlfile to ca-file and crl-file.
    - MINOR: sample: manage binary to string type convertion in stick-table and samples.
    - MINOR: acl: add parse and match primitives to use binary type on ACLs
    - MINOR: sample: export 'sample_get_trash_chunk(void)'
    - MINOR: conf: rename all ssl modules fetches using prefix 'ssl_fc' and 'ssl_c'
    - MINOR: ssl: add pattern and ACLs fetches 'ssl_fc_protocol', 'ssl_fc_cipher', 'ssl_fc_use_keysize' and 'ssl_fc_alg_keysize'
    - MINOR: ssl: add pattern fetch 'ssl_fc_session_id'
    - MINOR: ssl: add pattern and ACLs fetches 'ssl_c_version' and 'ssl_f_version'
    - MINOR: ssl: add pattern and ACLs fetches 'ssl_c_s_dn', 'ssl_c_i_dn', 'ssl_f_s_dn' and 'ssl_c_i_dn'
    - MINOR: ssl: add pattern and ACLs 'ssl_c_sig_alg' and 'ssl_f_sig_alg'
    - MINOR: ssl: add pattern and ACLs fetches 'ssl_c_key_alg' and 'ssl_f_key_alg'
    - MINOR: ssl: add pattern and ACLs fetches 'ssl_c_notbefore', 'ssl_c_notafter', 'ssl_f_notbefore' and 'ssl_f_notafter'
    - MINOR: ssl: add 'crt' statement on server.
    - MINOR: ssl: checks the consistency of a private key with the corresponding certificate
    - BUG/MEDIUM: ssl: review polling on reneg.
    - BUG/MEDIUM: ssl: Fix some reneg cases not correctly handled.
    - BUG/MEDIUM: ssl: Fix sometimes reneg fails if requested by server.
    - MINOR: build: allow packagers to specify the ssl cache size
    - MINOR: conf: add warning if ssl is not enabled and a certificate is present on bind.
    - MINOR: ssl: Add tune.ssl.lifetime statement in global.
    - MINOR: compression: Enable compression for IE6 w/SP2, IE7 and IE8
    - BUG: http: revert broken optimisation from 82fe75c1a79dac933391501b9d293bce34513755
    - DOC: duplicate ssl_sni section
    - MEDIUM: HTTP compression (zlib library support)
    - CLEANUP: use struct comp_ctx instead of union
    - BUILD: remove dependency to zlib.h
    - MINOR: compression: memlevel and windowsize
    - MEDIUM: use pool for zlib
    - MINOR: compression: try init in cfgparse.c
    - MINOR: compression: init before deleting headers
    - MEDIUM: compression: limit RAM usage
    - MINOR: compression: tune.comp.maxlevel
    - MINOR: compression: maximum compression rate limit
    - MINOR: log-format: check number of arguments in cfgparse.c
    - BUG/MEDIUM: compression: no Content-Type header but type in configuration
    - BUG/MINOR: compression: deinit zlib only when required
    - MEDIUM: compression: don't compress when no data
    - MEDIUM: compression: use pool for comp_ctx
    - MINOR: compression: rate limit in 'show info'
    - MINOR: compression: report zlib memory usage
    - BUG/MINOR: compression: dynamic level increase
    - DOC: compression: unsupported cases.
    - MINOR: compression: CPU usage limit
    - MEDIUM: http: add "redirect scheme" to ease HTTP to HTTPS redirection
    - BUG/MAJOR: ssl: missing tests in ACL fetch functions
    - MINOR: config: add a function to indent error messages
    - REORG: split "protocols" files into protocol and listener
    - MEDIUM: config: replace ssl_conf by bind_conf
    - CLEANUP: listener: remove unused conf->file and conf->line
    - MEDIUM: listener: add a minimal framework to register "bind" keyword options
    - MEDIUM: config: move the "bind" TCP parameters to proto_tcp
    - MEDIUM: move bind SSL parsing to ssl_sock
    - MINOR: config: improve error reporting for "bind" lines
    - MEDIUM: config: move the common "bind" settings to listener.c
    - MEDIUM: config: move all unix-specific bind keywords to proto_uxst.c
    - MEDIUM: config: enumerate full list of registered "bind" keywords upon error
    - MINOR: listener: add a scope field in the bind keyword lists
    - MINOR: config: pass the file and line to config keyword parsers
    - MINOR: stats: fill the file and line numbers in the stats frontend
    - MINOR: config: set the bind_conf entry on listeners created from a "listen" line.
    - MAJOR: listeners: use dual-linked lists to chain listeners with frontends
    - REORG: listener: move unix perms from the listener to the bind_conf
    - BUG: backend: balance hdr was broken since 1.5-dev11
    - MINOR: standard: make memprintf() support a NULL destination
    - MINOR: config: make str2listener() use memprintf() to report errors.
    - MEDIUM: stats: remove the stats_sock struct from the global struct
    - MINOR: ssl: set the listeners' data layer to ssl during parsing
    - MEDIUM: stats: make use of the standard "bind" parsers to parse global socket
    - DOC: move bind options to their own section
    - DOC: stats: refer to "bind" section for "stats socket" settings
    - DOC: fix index to reference bind and server options
    - BUG: http: do not print garbage on invalid requests in debug mode
    - BUG/MINOR: config: check the proper pointer to report unknown protocol
    - CLEANUP: connection: offer conn_prepare() to set up a connection
    - CLEANUP: config: fix typo inteface => interface
    - BUG: stats: fix regression introduced by commit 4348fad1
    - MINOR: cli: allow to set frontend maxconn to zero
    - BUG/MAJOR: http: chunk parser was broken with buffer changes
    - MEDIUM: monitor: simplify handling of monitor-net and mode health
    - MINOR: connection: add a pointer to the connection owner
    - MEDIUM: connection: make use of the owner instead of container_of
    - BUG/MINOR: ssl: report the L4 connection as established when possible
    - BUG/MEDIUM: proxy: must not try to stop disabled proxies upon reload
    - BUG/MINOR: config: use a copy of the file name in proxy configurations
    - BUG/MEDIUM: listener: don't pause protocols that do not support it
    - MEDIUM: proxy: add the global frontend to the list of normal proxies
    - BUG/MINOR: epoll: correctly disable FD polling in fd_rem()
    - MINOR: signal: really ignore signals configured with no handler
    - MINOR: buffers: add a few functions to write chars, strings and blocks
    - MINOR: raw_sock: always report asynchronous connection errors
    - MEDIUM: raw_sock: improve connection error reporting
    - REORG: connection: rename the data layer the "transport layer"
    - REORG: connection: rename app_cb "data"
    - MINOR: connection: provide a generic data layer wakeup callback
    - MINOR: connection: split conn_prepare() in two functions
    - MINOR: connection: add an init callback to the data_cb struct
    - MEDIUM: session: use a specific data_cb for embryonic sessions
    - MEDIUM: connection: use a generic data-layer init() callback
    - MEDIUM: connection: reorganize connection flags
    - MEDIUM: connection: only call the data->wake callback on activity
    - MEDIUM: connection: make it possible for data->wake to return an error
    - MEDIUM: session: register a data->wake callback to process errors
    - MEDIUM: connection: don't call the data->init callback upon error
    - MEDIUM: connection: it's not the data layer's role to validate the connection
    - MEDIUM: connection: automatically disable polling on error
    - REORG: connection: move the PROXY protocol management to connection.c
    - MEDIUM: connection: add a new local send-proxy transport callback
    - MAJOR: checks: make use of the connection layer to send checks
    - REORG: server: move the check-specific parts into a check subsection
    - MEDIUM: checks: use real buffers to store requests and responses
    - MEDIUM: check: add the ctrl and transport layers in the server check structure
    - MAJOR: checks: completely use the connection transport layer
    - MEDIUM: checks: add the "check-ssl" server option
    - MEDIUM: checks: enable the PROXY protocol with health checks
    - CLEANUP: checks: remove minor warnings for assigned but not used variables
    - MEDIUM: tcp: enable TCP Fast Open on systems which support it
    - BUG: connection: fix regression from commit 9e272bf9
    - CLEANUP: cttproxy: remove a warning on undeclared close()
    - BUG/MAJOR: ensure that hdr_idx is always reserved when L7 fetches are used
    - MEDIUM: listener: add support for linux's accept4() syscall
    - MINOR: halog: sort output by cookie code
    - BUG/MINOR: halog: -ad/-ac report the correct number of output lines
    - BUG/MINOR: halog: fix help message for -ut/-uto
    - MINOR: halog: add a parameter to limit output line count
    - BUILD: accept4: move the socketcall declaration outside of accept4()
    - MINOR: server: add minimal infrastructure to parse keywords
    - MINOR: standard: make indent_msg() support empty messages
    - MEDIUM: server: check for registered keywords when parsing unknown keywords
    - MEDIUM: server: move parsing of keyword "id" to server.c
    - BUG/MEDIUM: config: check-send-proxy was ignored if SSL was not builtin
    - MEDIUM: ssl: move "server" keyword SSL options parsing to ssl_sock.c
    - MEDIUM: log: suffix the frontend's name with '~' when using SSL
    - MEDIUM: connection: always unset the transport layer upon close
    - BUG/MINOR: session: fix some leftover from debug code
    - BUG/MEDIUM: session: enable the conn_session_update() callback
    - MEDIUM: connection: add a flag to hold the transport layer
    - MEDIUM: log: add a new LW_XPRT flag to pin the transport layer
    - MINOR: log: make lf_text use a const char *
    - MEDIUM: log: report SSL ciphers and version in logs using logformat %sslc/%sslv
    - REORG: http: rename msg->buf to msg->chn since it's a channel
    - CLEANUP: http: use 'chn' to name channel variables, not 'buf'
    - CLEANUP: channel: use 'chn' instead of 'buf' as local variable names
    - CLEANUP: tcp: use 'chn' instead of 'buf' or 'b' for channel pointer names
    - CLEANUP: stream_interface: use 'chn' instead of 'b' to name channel pointers
    - CLEANUP: acl: use 'chn' instead of 'b' to name channel pointers
    - MAJOR: channel: replace the struct buffer with a pointer to a buffer
    - OPTIM: channel: reorganize struct members to improve cache efficiency
    - CLEANUP: session: remove term_trace which is not used anymore
    - OPTIM: session: reorder struct session fields
    - OPTIM: connection: pack the struct target
    - DOC: document relations between internal entities
    - MINOR: ssl: add 'ssl_npn' sample/acl to extract TLS/NPN information
    - BUILD: ssl: fix shctx build on older compilers
    - MEDIUM: ssl: add support for the "npn" bind keyword
    - BUG: ssl: fix ssl_sni ACLs to correctly process regular expressions
    - MINOR: chunk: provide string compare functions
    - MINOR: sample: accept fetch keywords without parenthesis
    - MEDIUM: sample: pass an empty list instead of a null for fetch args
    - MINOR: ssl: improve socket behaviour upon handshake abort.
    - BUG/MEDIUM: http: set DONTWAIT on data when switching to tunnel mode
    - MEDIUM: listener: provide a fallback for accept4() when not supported
    - BUG/MAJOR: connection: risk of crash on certain tricky close scenario
    - MEDIUM: cli: allow the stats socket to be bound to a specific set of processes
    - OPTIM: channel: inline channel_forward's fast path
    - OPTIM: http: inline http_parse_chunk_size() and http_skip_chunk_crlf()
    - OPTIM: tools: inline hex2i()
    - CLEANUP: http: rename HTTP_MSG_DATA_CRLF state
    - MINOR: compression: automatically disable compression for older browsers
    - MINOR: compression: optimize memLevel to improve byte rate
    - BUG/MINOR: http: compression should consider all Accept-Encoding header values
    - BUILD: fix coexistence of openssl and zlib
    - MINOR: ssl: add pattern and ACLs fetches 'ssl_c_serial' and 'ssl_f_serial'
    - BUG/MEDIUM: command-line option -D must have precedence over "debug"
    - MINOR: tools: add a clear_addr() function to unset an address
    - BUG/MEDIUM: tcp: transparent bind to the source only when address is set
    - CLEANUP: remove trashlen
    - MAJOR: session: detach the connections from the stream interfaces
    - DOC: update document describing relations between internal entities
    - BUILD: make it possible to specify ZLIB path
    - MINOR: compression: add an offload option to remove the Accept-Encoding header
    - BUG: compression: disable auto-close and enable MSG_MORE during transfer
    - CLEANUP: completely remove trashlen
    - MINOR: chunk: add a function to reset a chunk
    - CLEANUP: replace chunk_printf() with chunk_appendf()
    - MEDIUM: make the trash be a chunk instead of a char *
    - MEDIUM: remove remains of BUFSIZE in HTTP auth and sample conversions
    - MEDIUM: stick-table: allocate the table key of size buffer size
    - BUG/MINOR: stream_interface: don't loop over ->snd_buf()
    - BUG/MINOR: session: ensure that we don't retry connection if some data were sent
    - OPTIM: session: don't process the whole session when only timers need a refresh
    - BUG/MINOR: session: mark the handshake as complete earlier
    - MAJOR: connection: remove the CO_FL_CURR_*_POL flag
    - BUG/MAJOR: always clear the CO_FL_WAIT_* flags after updating polling flags
    - MAJOR: sepoll: make the poller totally event-driven
    - OPTIM: stream_interface: disable reading when CF_READ_DONTWAIT is set
    - BUILD: compression: remove a build warning
    - MEDIUM: fd: don't unset fdtab[].updated upon delete
    - REORG: fd: move the speculative I/O management from ev_sepoll
    - REORG: fd: move the fd state management from ev_sepoll
    - REORG: fd: centralize the processing of speculative events
    - BUG: raw_sock: also consider ENOTCONN in addition to EAGAIN
    - BUILD: stream_interface: remove si_fd() and its references
    - BUILD: compression: enable build in BSD and OSX Makefiles
    - MAJOR: ev_select: make the poller support speculative events
    - MAJOR: ev_poll: make the poller support speculative events
    - MAJOR: ev_kqueue: make the poller support speculative events
    - MAJOR: polling: replace epoll with sepoll and remove sepoll
    - MAJOR: polling: remove unused callbacks from the poller struct
    - MEDIUM: http: refrain from sending "Connection: close" when Upgrade is present
    - CLEANUP: channel: remove any reference of the hijackers
    - CLEANUP: stream_interface: remove the external task type target
    - MAJOR: connection: replace struct target with a pointer to an enum
    - BUG: connection: fix typo in previous commit
    - BUG: polling: don't skip polled events in the spec list
    - MINOR: splice: disable it when the system returns EBADF
    - MINOR: build: allow packagers to specify the default maxzlibmem
    - BUG: halog: fix broken output limitation
    - BUG: proxy: fix server name lookup in get_backend_server()
    - BUG: compression: do not always increment the round counter on allocation failure
    - BUG/MEDIUM: compression: release the zlib pools between keep-alive requests
    - MINOR: global: don't prevent nbproc from being redefined
    - MINOR: config: support process ranges for "bind-process"
    - MEDIUM: global: add support for CPU binding on Linux ("cpu-map")
    - MINOR: ssl: rename and document the tune.ssl.cachesize option
    - DOC: update the PROXY protocol spec to support v2
    - MINOR: standard: add a simple popcount function
    - MEDIUM: adjust the maxaccept per listener depending on the number of processes
    - BUG: compression: properly disable compression when content-type does not match
    - MINOR: cli: report connection status in "show sess xxx"
    - BUG/MAJOR: stream_interface: certain workloads could cause get stuck
    - BUILD: cli: fix build when SSL is enabled
    - MINOR: cli: report the fd state in "show sess xxx"
    - MINOR: cli: report an error message on missing argument to compression rate
    - MINOR: http: add some debugging functions to pretty-print msg state names
    - BUG/MAJOR: stream_interface: read0 not always handled since dev12
    - DOC: documentation on http header capture is wrong
    - MINOR: http: allow the cookie capture size to be changed
    - DOC: http header capture has not been limited in size for a long time
    - DOC: update readme with build methods for BSD
    - BUILD: silence a warning on Solaris about usage of isdigit()
    - MINOR: stats: report HTTP compression stats per frontend and per backend
    - MINOR: log: add '%Tl' to log-format
    - MINOR: samples: update the url_param fetch to match parameters in the path