fix: MySQL 5.6 bind address

[lukewaite]

MySQL has been updated upstream of the PPA used for 5.6. These changes introduce new config file locations, and conf.d directories. The bind-address setting which was previously in /etc/mysql/my.cnf is now located in /etc/mysql/mysql.conf.d/mysqld.cnf.

I have tested this locally with Vaprobash set to install both "5.5" and "5.6" MySQL versions to verify I didn't break 5.5 support inadvertently.

[fideloper]

Awesome, thanks for this (and for regression testing, that's less common than hoped :D )

[dac514]

Setting mysql_version = "5.6" I'm getting:

==> Vaprobash: Setting up mysql-common-5.6 (5.6.28-0ubuntu0.14.04.1) ...
==> Vaprobash: Processing triggers for libc-bin (2.19-0ubuntu6.7) ...
==> Vaprobash: Processing triggers for ureadahead (0.100.0-16) ...
==> Vaprobash: sed: can't read /etc/mysql/mysql.conf.d/mysqld.cnf: No such file or directory
==> Vaprobash: Warning: Using a password on the command line interface can be insecure.
==> Vaprobash: mysql stop/waiting
==> Vaprobash: mysql start/running, process 13800

Someone else did too, and submitted a fix, but where did it go? I don't see it in master.

#514

Would be nice to do it conditionally.