close callbacks prior to closing connection to avoid potential race when e.g timer callback and connection_destroy run in parallel

It needs recompilation for embedded server, as layout of THD is different in embedded.

mysql-common and places mariadb-specific stuff in /etc/mysql/conf.d/mariadb.cnf.
This should allow to co-exist with default Debian mysql-common package and
help resolve dependencies when installing mariadb among multiple available
versions of MySQL from different repositories.

This gives the wrong path when testing installed server, and we
set the correct path in my.cnf anyway.

Always define UT_DBG_ABORT in innodb/xtradb, also on Windows. This will avoid endless hangs inside ut_dgb_stop_thread

Don't log updates to performance schema in replication log.
Ensure that we don't call ha_update after ha_index_or_rnd_end() is called on slave.


.bzrignore:
  Ignore some generated files
mysql-test/include/show_slave_status.inc:
  Ensure that ./ is removed from file names
mysql-test/suite/perfschema/r/binlog_mix.result:
  Updated results
mysql-test/suite/perfschema/r/binlog_row.result:
  Updated results
mysql-test/suite/perfschema/r/binlog_stmt.result:
  Updated results
mysql-test/suite/rpl/r/rpl_cant_read_event_incident.result:
  Updated results
mysql-test/suite/rpl/r/rpl_performance_schema.result:
  Ensure that we don't crash slave when we update performance schema
mysql-test/suite/rpl/t/rpl_performance_schema.test:
  Ensure that we don't crash slave when we update performance schema
sql/log_event.cc:
  Ensure that we don't call ha_update after ha_index_or_rnd_end() is called.
  Remove old code that is not needed anymore (like restarting read loop over all rows if no matcing row is found)
  Simplify code
sql/log_event_old.cc:
  Ensure that we don't call ha_update after ha_index_or_rnd_end() is called.
storage/myisam/ha_myisam.cc:
  More DBUG_PRINT
storage/perfschema/ha_perfschema.h:
  Don't log updates to performance schema in replication log.

Preprocessor macros USE_MYSYS_NEW and -DSAFEMALLOC are 
used to conditionally compile safemalloc or overwritten new/delete.

-Define dummy symbol in my_new.cc in case -DUSE_MYSYS_NEW is not set.
This avoids compiler/linker warnings about an essentially empty file
being compiled.

nes prefixed with .\ or ./
- Add my_basename() to mysys.
- Do not compile files that are not needed on Windows (my_addr_resolve, an
d safemalloc related stuff it it is not used)
Avoids linker warnings about compilation of essentially empty files.

The root cause is that after recent fixes around --debug variable (lp:909051)
the variable is now available in both release and debug builds, such that MTR
cannot tell a debug compiled server from optimized one.

To fix, assign a special default value 'disabled' for 'debug' variable in optimized build
and fix MTR to check for this special value to recognize optimized build.