Fix the UI language-setting breakage.

UI code was looking for exact language matches without considering country.
If no exact match is found, then the country code is stripped off and the
base language code is checked for instead.
Display client counts for servers as players+bots.
Register cgame cvars as early as possible.

This avoids the options menu showing incorrect defaults for a fresh install
before a game is started.
Minor bot-reporting fix.