campaignd: Log unrecognized FIFO commands

src/campaign_server/campaign_server.cpp

@@ -294,6 +294,8 @@ void server::run()
 				if(ctl == "shut_down") {
 					LOG_CS << "Shut down requested by admin, shutting down...\n";
 					break;
+				} else {
+					LOG_CS << "Unrecognized admin command: " << ctl.full() << '\n';
 				}
 			}
 

src/campaign_server/control.hpp

@@ -105,6 +105,14 @@ class control_line
 		return args_[n];
 	}
 
+	/**
+	 * Return the full command line string.
+	 */
+	std::string full() const
+	{
+		return utils::join(args_, " ");
+	}
+
 private:
 	std::vector<std::string> args_;
 };