The "aria_recover" variable should be renamed "aria_recover_options" to match MyISAM

According to the MySQL 5.5 documentation, the variable myisam_recover has been renamed to myisam_recover_options on MySQL 5.5.3.

The equivalent variable for Aria that accepts the same values and also accepts multiple options separated by a comma is aria_recover.

It would be more logical for both options to have a similar name.