@extra/comp_err.c
- This is the script that generates error messages from sql/share/errmsg-utf8.txt. With a malformed errmsg-utf8.txt it produced a not very helpful error message. Added a printout of the bad line to help debugging.

@mysql-test/include/assert.inc, @mysql-test/include/master-slave.inc
- Document existing, undocumented parameters.

@mysql-test/include/show_rpl_debug_info.inc
- Select from mysql.gtid_executed table.

@sql/binlog.cc
- Print reason for switching to row format to the debug trace.

@sql/log_event.cc
- Use encapsulated function instead of accessing owned_gtid directly.

@sql/rpl_gtid.h
- Add Checkable_rwlock::dbug_trace when DBUG mode is enabled. This flag controls whether all lock/unlock operations are written to the DBUG trace or not.

@sql/rpl_gtid_execution.cc
- Remove redundant statement 'thd->owned_gtid= gtid_next'. This was done already in gtid_state->acquire_ownership, called above this line.

@sql/rpl_gtid_persi...