* RegionMap: inverted 'flags' to _deny_ bits

* Mesh: new filterRecvFloodPacket() for overriding
* repeater CLI: 'allow' -> 'allowf' or 'denyf'

src/Mesh.h

@@ -43,6 +43,11 @@ protected:
    */
   DispatcherAction routeRecvPacket(Packet* packet);
 
+  /**
+   * \returns  true, if given packet should be NOT be processed.
+   */
+  virtual bool filterRecvFloodPacket(Packet* packet) { return false; }
+
   /**
    * \brief  Check whether this packet should be forwarded (re-transmitted) or not.
    *     Is sub-classes responsibility to make sure given packet is only transmitted ONCE (by this node)