Note:
-----
this is a major update of mysql from version 5.5 to 5.6 and it's
highly recommended to make a database backup with mysqldump before
the update!
even though we have a major new version with this release the
update is mostly backwards compatible, but please note:
- new runtime dependency opt/libaio
- new buildtime dependency cmake
- ImmoDB is now the default database engine, the supplied
/etc/my.conf still sets MyISAM as the default and skips
InnoDB. Don't reject /etc/my.cnf without inspection.
- after the upgrade fix or rejmerge /etc/my.cnf, start
the server and run mysql_upgrade to adjust the mysql
system database tables.