BUG/MINOR: log: The log of quotted capture header has been terminated by 2 quotes.

Julien Vehent repport that the log format '%{+Q}hr' display the value
termnated by two chars '"' like this: '"value""'. This patch just remove
the second quote.

This bug is old but 1.5-specific but users of older 1.5 versions may be
interested in a backport.
BUG/MEDIUM: http: don't start to forward request data before the connect

Currently, "balance url_param check_post" randomly works. If the client
sends chunked data and there's another chunk after the one containing the
data, http_request_forward_body() will advance msg->sov and move the start
of data to the beginning of the last chunk, and get_server_ph_post() will
not find the data.

In order to avoid this, we add an HTTP_MSGF_WAIT_CONN flag whose goal is
to prevent the forwarding code from parsing until the connection is
confirmed, so that we're certain not to fail on a redispatch. Note that
we need to force channel_auto_connect() since the output buffer is empty
and a previous analyser might have stopped auto-connect.

The flag is currently set whenever some L7 POST analysis is needed for a
connect() so that it correctly addresses all corner cases involving a
possible rewind of the buffer, waiting for a better fix.

Note that this has been broken for a very long time. Even all 1.4 versions
seem broken but differently, with ->sov pointing to the end of the arguments.
So the fix should be considered for backporting to all stable releases,
possibly including 1.3 which works differently.
MINOR: http: release compression context only in http_end_txn()

Currently there are two places where the compression context is released,
one in session_free() and another one in http_end_txn_clean_session().
Both of them call http_end_txn(), either directly or via http_reset_txn(),
and this function is made for this exact purpose. So let's centralize the
call there instead.
MINOR: protect ebimtree/ebistree against multiple inclusions

These two files were missing the usual #ifndef around the code.
(cherry picked from commit f2873b23705ff08ca3ab4f1a6b27050e572e1d9e)
MEDIUM: proxy: create a tree to store proxies by name

Large configurations can take time to parse when thousands of backends
are in use. Let's store all the proxies in trees.

findproxy_mode() has been modified to use the tree for lookups, which
has divided the parsing time by about 2.5. But many lookups are still
present at many places and need to be dealt with.
MEDIUM: proxy: make findproxy() use trees to look up proxies

Both proxy IDs and names are now looked up from the trees.
MEDIUM: proxy: make get_backend_server() use findproxy() to lookup proxies

This one is used by stats to look up proxy and server names in server state
manipulation. Get rid of the linear search.
MEDIUM: stick-table: lookup table names using trees.

This will speed up config parsing time when many stick-table references
are used, as well as stick-table manipulations from the CLI.
MEDIUM: config: faster lookup for duplicated proxy name

cfg_parse_listen() currently checks for duplicated proxy names.
Now that we have a tree for this, we can use it.

The config load time was further reduced by 1.6, which is now
about 4.5 times faster than what it was without the trees.

In fact it was the last CPU-intensive processing involving proxy
names. Now the only remaining point is the automatic fullconn
computation which can be bypassed by having a fullconn in the
defaults section, reducing the load time by another 10x.
MINOR: standard: add function "encode_chunk"

This function has the same behavior as encode_string(), except it
takes a "struct chunk" instead of a "char *" on input.
BUG/MINOR: http: fix encoding of samples used in http headers

The binary samples are sometimes copied as is into http headers.
A sample can contain bytes unallowed by the http rfc concerning
header content, for example if it was extracted from binary data.
The resulting http request can thus be invalid.

This issue does not yet happen because haproxy currently (mistakenly)
hex-encodes binary data, so it is not really possible to retrieve
invalid HTTP chars.

The solution consists in hex-encoding all non-printable chars prefixed
by a '%' sign.

No backport is needed since existing code is not affected yet.
MINOR: sample: add hex converter

This new filter converts BIN type to its hexadecimal
representation in STR type. It is used to keep the
compatibility with the original bin2str cast.

It will be useful when bin2str changes to copy the
string as-is without encoding anymore.
MEDIUM: sample: change the behavior of the bin2str cast

The bin2str cast gives the hexadecimal representation of the binary
content when it is used as string. This was inherited from the
stick-table casts without realizing that it was a mistake. Indeed,
it breaks string processing on binary contents, preventing any _reg,
_beg, etc from working.

For example, with an HTTP GET request, the fetch "req.payload(0,3)"
returns the 3 bytes "G", "E", and "T" in binary. If this fetch is
used with regex, it is automatically converted to "474554" and the
regex is applied on this string, so it never matches.

This commit changes the cast so that bin2str does not convert the
contents anymore, and returns a string type. The contents can thus
be matched as is, and the NULL character continues to mark the end
of the string to avoid any issue with some string-based functions.

This commit could almost have been marked as a bug fix since it
does what the doc says.

Note that in case someone would rely on the hex encoding, then the
same behaviour could be achieved by appending ",hex" after the sample
fetch function (brought by previous patch).
CLEANUP: acl: remove obsolete test in parse_acl_expr()

The ACL keyword returned by find_acl_kw() is checked for having a
valid ->parse() function. This dates back 2007 when ACLs were reworked
in order to differenciate old and new keywords. This check is
inappropriate and confusing since all keywords have a parser now.
MAJOR: auth: Change the internal authentication system.

This patch remove the limit of 32 groups. It also permit to use standard
"pat_parse_str()" function in place of "pat_parse_strcat()". The
"pat_parse_strcat()" is no longer used and its removed. Before this
patch, the groups are stored in a bitfield, now they are stored in a
list of strings. The matching is slower, but the number of groups is
low and generally the list of allowed groups is short.

The fetch function "smp_fetch_http_auth_grp()" used with the name
"http_auth_group" return valid username. It can be used as string for
displaying the username or with the acl "http_auth_group" for checking
the group of the user.

Maybe the names of the ACL and fetch methods are no longer suitable, but
I keep the current names for conserving the compatibility with existing
configurations.

The function "userlist_postinit()" is created from verification code
stored in the big function "check_config_validity()". The code is
adapted to the new authentication storage system and it is moved in the
"src/auth.c" file. This function is used to check the validity of the
users declared in groups and to check the validity of groups declared
on the "user" entries.

This resolve function is executed before the check of all proxy because
many acl needs solved users and groups.
MEDIUM: acl/pattern: standardisation "of pat_parse_int()" and "pat_parse_dotted_ver()"

The goal of these patch is to simplify the prototype of
"pat_pattern_*()" functions. I want to replace the argument "char
**args" by a simple "char *arg" and remove the "opaque" argument.

"pat_parse_int()" and "pat_parse_dotted_ver()" are the unique pattern
parser using the "opaque" argument and using more than one string
argument of the char **args. These specificities are only used with ACL.
Other systems using this pattern parser (MAP and CLI) just use one
string for describing a range.

This two functions can read a range, but the min and the max must y
specified. This patch extends the syntax to describe a range with
implicit min and max. This is used for operators like "lt", "le", "gt",
and "ge". the syntax is the following:

   ":x" -> no min to "x"
   "x:" -> "x" to no max

This patch moves the parsing of the comparison operator from the
functions "pat_parse_int()" and "pat_parse_dotted_ver()" to the acl
parser. The acl parser read the operator and the values and build a
volatile string readable by the functions "pat_parse_int()" and
"pat_parse_dotted_ver()". The transformation is done with these rules:

If the parser is "pat_parse_int()":

   "eq x" -> "x"
   "le x" -> ":x"
   "lt x" -> ":y" (with y = x - 1)
   "ge x" -> "x:"
   "gt x" -> "y:" (with y = x + 1)

If the parser is "pat_parse_dotted_ver()":

   "eq x.y" -> "x.y"
   "le x.y" -> ":x.y"
   "lt x.y" -> ":w.z" (with w.z = x.y - 1)
   "ge x.y" -> "x.y:"
   "gt x.y" -> "w.z:" (with w.z = x.y + 1)

Note that, if "y" is not present, assume that is "0".

Now "pat_parse_int()" and "pat_parse_dotted_ver()" accept only one
pattern and the variable "opaque" is no longer used. The prototype of
the pattern parsers can be changed.
MEDIUM: pattern: The pattern parser no more uses <opaque> and just takes one string.

After the previous patches, the "pat_parse_strcat()" function disappear,
and the "pat_parse_int()" and "pat_parse_dotted_ver()" functions dont
use anymore the "opaque" argument, and take only one string on his
input.

So, after this patch, each pattern parser no longer use the opaque
variable and take only one string as input. This patch change the
prototype of the pattern parsing functions.

Now, the "char **args" is replaced by a "char *arg", the "int *opaque"
is removed and these functions return 1 in succes case, and 0 if fail.
MEDIUM: pattern: Change the prototype of the function pattern_register().

Each pattern parser take only one string. This change is reported to the
function prototype of the function "pattern_register()". Now, it is
called with just one string and no need to browse the array of args.
CONTRIB: ip6range: add a network IPv6 range to mask converter

It can be used to convert some Maxmind geolocation IPv6 lists using the
CVS format to IPv6 networks format.
MINOR: pattern: separe list element from the data part.

This commit separes the "struct list" used for the chain the "struct
pattern" which contain the pattern data. Later, this change will permit
to manipulate lists ans trees with the same "struct pattern".