File

util.set: Add a serialization preparation metamethod Enables util.serialization to turn Sets into a representation that can be deserialized with an environment trick, i.e. `set{"a","b"}`. Also useful for debug purposes.

# Basic login and initial presence

[Client] Romeo
	jid: user@localhost
	password: password

---------

Romeo connects

Romeo sends:
	<presence/>

Romeo receives:
	<presence/>

Romeo disconnects