Unexpected prestige abilities

News #1163 posted by Kali on 10/20/20.

Prestige classes unexpectedly had access to some pkill skills in the arena.
This was an unintended bug that has been adjusted.

There are some other issues related to skills and spells going to prestige
when they should not and those will be addressed in the future. This will
hopefully be done in concert with intentional upgrades where possible.