MySQL patches by Codership

Comment 5 for bug 1251137

MySQL 5.6 -> 5.5 replication is violated if 5.6 node uses gtid, binlog checksums or new ROW event formats. These can be prevented by configuring 5.6 node with:

log_bin_use_v1_row_events=1
gtid_mode=0
binlog_checksum=NONE

With this configuration, at least basic 5.6 -> 5.5 replication seems to work. But more testing is needed...