I just finished the rename from seatbelt,easy to althold,poshold in #858 and merged in the latest upstream master.  Pushed.  Decided to wait for feedback on the conversion of the mode_sw to enable separate channel mapping for auto and assist.  It really doesn't add any capability and although it makes all the mode switch behavior consistent, I think it may be confusing to people who follow the recommended setup.  Let me know your opinions on this - I am on the fence.