* new PAYLOAD_TYPE_CONTROL (11)

* repeater: onControlDataRecv(), now responds to new CTL_TYPE_NODE_DISCOVER_REQ (zero hop only)
* node prefs: new discovery_mod_timestamp  (will be set to affect when node should respond to DISCOVERY_REQ's )

src/helpers/CommonCLI.h

@@ -46,6 +46,7 @@ struct NodePrefs { // persisted to file
   uint8_t gps_enabled;
   uint32_t gps_interval; // in seconds
   uint8_t advert_loc_policy;
+  uint32_t discovery_mod_timestamp;
 };
 
 class CommonCLICallbacks {