Commands are not found in topic that have a slash in their name

[molnarg]

So, I have a topic named x/y, and I define a command name z within that topic. The gateway subscribes to that topic and gets the messages sent (x/y/z), but then fails to process the command with an exception. This is because the command lookup fn assumes that the command name comes after the first slash in the topic name: https://github.com/BlackZork/mqmgateway/blob/54b47a32c70cc39de991d3e0766ade62402b4f6d/libmodmqttsrv/mqttclient.cpp#L257

[molnarg]

It should find the command after the last slash instead.