Improved client and reseller limit checks

Fixed FS#775 - Client can choose the servers for it's client 

Fixed: Missing server.ini config entries for vlogger and jailkit
Added: Admin interface server_config for vlogger and cron

- changed GRANTs for slave servers on multiserver setups
- added option for clients to change path of ftp users (inside webroot)
- extended software packaging system (return status of install)
- added 2 plugins for automatically create symlinks webmail and phpmyadmin on each website (not enabled by default)

Improved language file loading.

Fixed a bug that prevented the modification of website settings of a site that the user created.

- FS#501 - disable shell account untill jailkit is finished 

fix for local characters not encoded properly in welcome-email. remove trailing empty lines from finnish language, again...

added missing dots in dns template examples and added a function which adds the dots automatically when missing.

- Added onKeypress handler for the username field in the login form.