Bitcoin Knots OP_RETURN history

Oct 2013 - allow a single 80 byte OP_RETURN

Feb 2014 - limit reduced from 80 to 40 bytes

Nov 2014 - limit increased from 40 to 80 bytes

Oct 2015 - limit increased from 80 to 83 bytes

Nov 2023 - limit reduced from 80 to 42