Fixed/Implemented: replaced intval() by $app->functions->intval() in all interface functions due to big number problem in intval()

Sort and limit in ispconfig all templates... additional info howtoforge - http://www.howtoforge.com/forums/showthread.php?p=274790

use the standardize app->db->quote method already established.

Refs: 1722

Handling For: Warning: Invalid argument supplied for foreach() on lines 54, 141 and 178. - Empty Arg Array.

Enhancement of the Website-List. The user can only select the server as filter, he has some sites at (and not ALL Servers of the server-farm)

Added new "DATE" datatype which uses the native mysql date format instead of tstamps in tform library. The old tstamp datatype as been renamed to "DATETSTAMP".

- Small improve

- Improve of multilanguage, now the string of list-file mustn't be repeated in dozens of files and dozens of times translate and check for this any list page is not necessary now

- Updated Debian installation instructions.

Several fixes to avoid strict warnings. Made a variable public in db_mysql.inc.php. Added missing language tokens to en_users.lng

Fixed the uses function in app.inc.php