Provide explicit time checking for age of persistent DCBs.

server/core/server.c

@@ -71,6 +71,10 @@ SERVER 	*server;
 
 	if ((server = (SERVER *)calloc(1, sizeof(SERVER))) == NULL)
 		return NULL;
+#if defined(SS_DEBUG)
+        server->server_chk_top = CHK_NUM_SERVER;
+        server->server_chk_tail = CHK_NUM_SERVER;
+#endif
 	server->name = strdup(servname);
 	server->protocol = strdup(protocol);
 	server->port = port;