[4.2] Fixed empty string in database connection config 'unix_socket' causes system to default to socket connection instead of host connection
minor comment addition in MySqlConnector.php
Merge branch '4.2' of https://github.com/tgolsen/framework into tgolsen-4.2
cleaning up some code.
Automatically retry queries on database connections that have 'gone away'.
Cleaning up some code.