databases/mysql56-{client, server}: Upgrade to new release 5.6.42
Upstream Bug #27788907, Bug #90264 fixed
Bug Fixes:
Raised assertion during an OPTIMIZE TABLE operation for InnoDB: Bug #27753193 For MEMORY tables, memory overflow errors could occur: Bug #27799513 Incorrectly handled very long table keys on replication slaves: Bug #27930505
More info on update:
https://dev.mysql.com/doc/relnotes/mysql/5.6/en/news-5-6-42.html
Sponsored by: The FreeBSD Foundation