- 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.

- Added SNI config field in sysetm > server config > web.

- Added Limit fields for openvz in the database
- Limited several vm functions to be used by admin only.

- replace double-quotes with single-quotes whenever appropriate
- fix indentation

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The "new" php session-cleaning source works fine for several days at my servers, so we can delete the old (not working) one

BUG FS#1139 - fix as described in forum has been applied and tested by running script - no errors encountered. - and query checked with mysql.