Added Debian Jessie to version detection code.

Till Brehm

2015-04-26 6a61a1a579725676bdca7fb2ae526d15cdfa3238

 server/lib/classes/monitor_tools.inc.php

@@ -149,6 +149,11 @@
            $distver = 'Wheezy/Sid';
            $distid = 'debian60';
            $distbaseid = 'debian';
         } elseif(strstr(trim(file_get_contents('/etc/debian_version')), '8') || substr(trim(file_get_contents('/etc/debian_version')),0,1) == '8') {
            $distname = 'Debian';
            $distver = 'Jessie';
            $distid = 'debian60';
            $distbaseid = 'debian';
         } else {
            $distname = 'Debian';
            $distver = 'Unknown';