Merge pull request #6581 from bcook-r7/uuidretry

don't send a response on invalid UUID, allow stagers to survive another day

lib/msf/core/handler/reverse_http.rb

@@ -420,9 +420,7 @@ protected
         unless [:unknown_uuid, :unknown_uuid_url].include?(info[:mode])
           print_status("Unknown request to #{request_summary}")
         end
-        resp.code    = 200
-        resp.message = 'OK'
-        resp.body    = datastore['HttpUnknownRequestResponse'].to_s
+        resp = nil
         self.pending_connections -= 1
     end