various Asibfm700MountConfig class fixes

asibfm700/asibfm700_netserver_main.cpp

@@ -71,7 +71,7 @@ int main(int argc, char* argv[])
 
             return 0;
         } else {
-            return 255;
+            // just ignore
         }
 
         auto logname = opt_result["log"].as<std::string>();