erp5.recipe.mysqlserver

Despite that mysql_host was configured in part, default template in recipe did
not have this parameter, so mysql was listening on default (0.0.0.0) address.

This change will make fix in recipe backward compatible - on old configurations
mysql server will still listen on 0.0.0.0


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@36969 20353a03-c40f-0410-a6d1-a30d3c3de9de