New connection event

It's currently useless though, it always gives an ID of 0 regardless of
who is connecting.
Sponitor based random

Uses UWE's new player skill data to sort teams. Who knows if it's any
good, but I'd like to think it'd be better than NS2 stats data.
Bit neater
Real reserved slots

Easy as that.
Oops

I should remember about these clamps.
Merge pull request #192 from Person8880/develop

Build 252/253 improvements