Rename ConnectionSettings close_after_match

[NicEastvillage]

The ConnectionSettings::close_after_match has confused a few people using the lower level interfaces since the connection is not actually closed when the match ends, but rather, when a match is stopped with a StopMatch message or a new match begins with a StartMatch message. I propose renaming it to close_between_matches.

[swz-git]

I think its pretty hard to define the behavior of this field with a short name. close_between_matches still implies that the bot will get closed after a match. The best we could do IMO is replace/append this comment with something like /// RLBot doesn't actually know when a match ends. Therefor, your bot/script will only be closed once a StopMatch or StartMatch packet is sent.

[NicEastvillage]

Yeah, that comment would be a great addition to remove all confusion. But I still think close_between_matches is slightly better since it does not have immediacy to it.