Added support for git-stable branch (currently stable-3.1 branch) in ISPCon...

Till Brehm

2016-01-31 299f8ebfb16a2b40f4142d1b1ba175ed3160d834

 server/scripts/ispconfig_patch

@@ -102,6 +102,7 @@

if(!is_installed('patch')) {
   swriteln("The program 'patch' is missing on your server. Please install it and try again.");
   exit;
}

$patch_id = simple_query('Enter patch id', false, '');