Use a nice default for the vhost script.

scripts/ans-vhost-freemem

@@ -34,6 +34,9 @@ def parse_args(args):
             hn = hn.replace('\n', '')
             opts.host.append(hn)
 
+    if not opts.host:
+        opts.host = ["virthost*"]
+
     return opts, args, parser