Fixes some odd bugs about the pause system. Including /pause while /spec, vice-versa and force_pause.
Consequently fixes the vote "Move player to spectators".
First reported in #628.
If there are problems with this /invite function, why u don't lock a team with a pass.
/lock 123 ---> /join 123. so ppl don't have to invite others and have the ability to spam ppl, just need to share their pass via /w