If asked for an "A" record for something which looks like an IPv4 address
(e.g. "dig a 1.2.3.4"), don't return a fake "A" record.  (Normally "dnscache"
will pretend that the domain 1.2.3.4 exists, with the address 1.2.3.4; this
patch disables that.)

--- query.c.orig	2001-02-11 21:11:45.000000000 +0000
+++ query.c	2006-11-01 15:13:17.000000000 +0000
@@ -116,7 +116,6 @@
     byte_copy(ip,4,"\177\0\0\1");
     return 1;
   }
-  if (dd(d,"",ip) == 4) return 1;
   return 0;
 }