Rationalise SERV_MARK use.

src/cache.c

@@ -1642,10 +1642,6 @@ int cache_make_stat(struct txt_record *t)
       t->txt = (unsigned char *)buff;
       t->len = p - buff;
 
-      /* clear our workspace, these bits are assumed zero elsewhere. */
-      for (serv = daemon->servers; serv; serv = serv->next)
-	serv->flags &= ~SERV_MARK;
-
       return 1;
     }
   
@@ -1706,10 +1702,6 @@ void dump_cache(time_t now)
 	my_syslog(LOG_INFO, _("server %s#%d: queries sent %u, retried or failed %u"), daemon->addrbuff, port, queries, failed_queries);
       }
 
-  /* other code assumes these are left as zeros. */
-  for (serv = daemon->servers; serv; serv = serv->next)
-    serv->flags &= ~SERV_MARK;
-
   if (option_bool(OPT_DEBUG) || option_bool(OPT_LOG))
     {
       struct crec *cache ;

src/domain-match.c

@@ -529,10 +529,14 @@ void mark_servers(int flag)
   for (serv = daemon->servers; serv; serv = serv->next)
     if (serv->flags & flag)
       serv->flags |= SERV_MARK;
+    else
+      serv->flags &= ~SERV_MARK;
 
   for (serv = daemon->local_domains; serv; serv = serv->next)
     if (serv->flags & flag)
       serv->flags |= SERV_MARK;
+    else
+      serv->flags &= ~SERV_MARK;
 }
 
 void cleanup_servers(void)

src/network.c

@@ -1507,6 +1507,9 @@ void check_servers(int no_loop_check)
     loop_send_probes();
 #endif
 
+  /* clear all marks. */
+  mark_servers(0);
+  
  /* interface may be new since startup */
   if (!option_bool(OPT_NOWILD))
     enumerate_interfaces(0);