Suggestion: remove "auto-guide AT" option from difficulty settings.

Reason:
The overall reason for it being present is, as I understand it, historic. It has been there since OFP times due to not having any guided AT weapons in the game - and this fact making shooting tanks too hard for inexperienced players.
I reckon, for the sake of authenticity, it's no more worth to maintain it (especially considering it created a few bugs in ArmA 2). Guided weapons should be guided regardless of difficulty, so are unguided ones.