Allow 32 charactes for user names
Since MySQL 5.7.8, user names can be up to 32 characters long.
I have searched on ISPConfig to avoid this limitation with MySQL 5.7.8 or higher, and I found the 16 characters limitation is in file database_user_edit.php, so changing the limit to 32 is working.
I propose to add a new "Database" tab in "Server Config" to allow decide the ipsconfig administrator to use 16 or 32 characters length, with an information description about supported databases. Default value should be 16.