Peter M. Groen / FlashMQ

My IDE didn't understand them for finding symbols, apparently.

Fix websocket crash case

Fix infinite loop on lying about websocket frame sizes

This fixes infinite loops when you send a frame type that is not handled.

Also changed the disconnect reason a little: it now shows them all, so I
don't have to worry about which one is more important.

This includes a timer mechanism.

Connected to this is preventing duplicate subscriptions. It's a bit
unclear what to do when you get a subscription for the same topic with a
different QoS? Change the Qos? Ignore?

Also includes fixes to packet parsing that I couldn't make a separate
commit for.

When it comes to QoS 1, these things are still left, off the top of my
head:

- vector for qos queue? It helps with ordering and is CPU cache friendly.
- Store subscription QoS.
- Do retained messages have QoS?
- Give session client's name, to access it later.

In preparation for clean session and qos.

This saves mildly costly calls to find().

It's a little faster.

Also materializes some concepts about MqttPacket.

Roughly...