Added a third parameter to $app->log() function in server part to turn off logging to database and use this option in mysql lib to not log any server side SQL errors to the database.

- disabled database logging of sql reconnect errors, fixed #3974

- Added HHVM to "Default PHP Handler" field (server configuration).
- Fixed "Unable to load the server configuration from database." error when running server.sh.
- Fixed Javascript (accordions weren't working anymore, directive snippets and other placeholders couldn't be added anymore).

Changed query syntax of alias domain edit file
Changed deprecated syntax in alpha plesk importer

add database-size monitoring. the results stored in the database may be used to add the db-size to the web-quota, too.

- Added "actions" framework in server to replace the functions provided by the core modules
- Moved system update function from remoteactins core module to software update plugin.