The INCIDENT_EVENT always caused slave error and abort, without checking
--slave-skip-errors.

Now, if error 1590, ER_SLAVE_INCIDENT is included in the --slave-skip-errors
list, incident events will be ignored.

This is a merge of this MySQL 5.6 patch:

revision-id: frazer@mysql.com-20110314170916-ypgin17otj3ucx95
committer: Frazer Clement <frazer@mysql.com>
timestamp: Mon 2011-03-14 17:09:16 +0000
message:
  Bug#11799671 NOT POSSIBLE TO SKIP INCIDENT ERRORS