detect the ubuntu version based on /etc/os-release

Uwe Merbeth

2016-05-09 f5daecadf5846ff0b2d512e6a1a47f17342fe02b

 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, '');