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 several functions in site module
- added server classes to restart services