Previously we only stored the first given error (the error sent to the client)

Some variable wasn't moved to the initial state during mysql_server_end

in order to output a special warning about a particular case of segfaults
due to a mix of static binaries, NSS, and LDAP. (Bug #4872)

This removes a (small) memory leak.

auto-commit on Xid_log_event

    don't define UNIV_DEBUG in CFLAGS/CXXFLAGS anymore
sql/mysqld.cc
    hide from the user options that do nothing
sql/sql_update.cc
    better fix for uninitialized used_index

  Support for COMMIT/ROLLBACK optional arguments

- Added a thread that fetches commit_count for open tables. This
will mean that NDB will not have to be contacted for every use of a cached query. 

server on Windows service startup, and not just --defaults-file=file. This
appears to be an unnecessary limitation, but fixing that will require
a larger refactoring of the Windows service installation and startup code.
(Bug #7856)

fix for binlog+autocommit+tclog
comments, style fixes

to avoid linking problems referring to the variable from .c programs.

  Add settable variables for semi-sync replication

lower_case_tables_names=2 is sensible. Related to Bug #7887.

Made user_limits.test scheduling independant (this solves failure on QNX).

Made sys_var_max_user_conn variable int sized. Changed 
max_user_connections from ulong to uint to be able to use it in 
sys_var_max_user_conn::value_ptr() (solves failures on 64-bit platforms).

on a case-sensitive filesystem. (Bug #7887)

This patch collects all previous patches into one.

The main problem was due to that there is are two variables -
dflt_key_cache and sql_key_cache with have more or less duplicate
function. The reson for the bug was that the default value in the key
cache hash was set to dflt_key_cache, then sql_key_cache was set to a
new key cache object, and then dflt_key_cache was set to sql_key_cache
which was different from the dflt_key_cache_var. After sending SIGHUP,
the server was using the original default value for the key cache hash,
which was different from the actual key cache object used for the
default key cache.

added number_of_replicas printout in show table status

  Fix test result affected by error message rewording.
errmsg.txt:
  Reword error messages.
set_var.cc:
  Reorder variables.
mysqld.cc:
  Reorder options.

  Logging to logging@openlogging.org accepted
innodb.result, innodb.test, set_var.cc, mysqld.cc:
  change variable innodb_free_tickets_to_enter to innodb_concurrency_tickets

Encourage user to specify a name for the binlog index file (either by giving an argument to --log-bin,
or by using --log-bin-index). This is so that he does not have a replication break when his master's
hostname changes. Plus binary logging options consistency checks.

  Fix out-of-order option.