FS#880 - field created_at in table clients 

Check if the mysql_connect function exists in the installer.

Fixed a problem with broken tolower function in maildrop when compiled with some specific gcc settings by forcing lowercase addresses in master.cf and adding a workaround in case that tolower returns a empty result.

Added a missing language string in server config form.

Updated version number to 3.0.1.4 and changed sort order to domain name in the mailbox, alias and forward forms.

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

Added: interface module web traffic statistics
Fixed: mail_traffic is now reported to master server instead of local
Fixed: GRANTs for slave server database user on master database

- checking for running instance in server.php

- 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)

Set version number to 3.0.1.3

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Removed some unmaintained tables and files and introduced the pre_update.sql script for sql commands to be run before an update.

"sys_perm_all" was wrong and is obsolete - sorry.