Fix broken cache.

CHANGELOG

@@ -5,6 +5,8 @@ version 2.65
 
 	    Fix failure to build with DHCP support excluded. Thanks to 
 	    Gustavo Zacarias for the patch.
+	    
+	    Fix nasty regression in 2.64 which completely broke cacheing.
 
 
 version 2.64

src/cache.c

@@ -394,7 +394,7 @@ struct crec *cache_insert(char *name, struct all_addr *addr,
   int freed_all = flags & F_REVERSE;
   int free_avail = 0;
 
-  if(daemon->max_cache_ttl < ttl)
+  if (daemon->max_cache_ttl != 0 && daemon->max_cache_ttl < ttl)
     ttl = daemon->max_cache_ttl;
 
   /* Don't log keys */