Improved client and reseller limit checks

Set version number to 3.0.1.3

Fixed: Error Server can not be changed when trying to modify a spamfilter blacklist or whitelist record 

- Changed shell of website linux user to /bin/false

- added a daily cronjob for stats creation in the installer.
- Fixed a bug in the spamfilter white / blacklist forms (thanks to satommy for reporting this)
- fixed ssl cert path in vhost templates/web_domain_ssl.htm
- fixed a bug in the apache plugin which prevented the copying of the standard error and index files.