Reverted SVN trunk back to revision 3938 to remove changes in default theme an a replacement of the ispconfig logo.

- Added backup size to web backups

Links removed from sum rows in stats

- Added overtraffic notifications to traffic quota system (part of FS#2059 - Extend Traffic quota system)

- install: touch auth.log
- login: write success/fail to auth.log
- cron: log rotation for auth.log

- 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.