Added group

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@1877 d4fa192b-c00b-0410-8231-f00ffab90ce4

debian/varnish.postinst

@@ -2,7 +2,7 @@
 
 varnish_setup_user() {
         if ! id varnish > /dev/null 2>&1 ; then
-                adduser --system --no-create-home varnish 2>&1 > /dev/null || exit 78
+                adduser --system --no-create-home --group varnish 2>&1 > /dev/null || exit 78
         fi
 }