BUR #6823 has been approved by @evazion.
create alias hands_above_head -> arms_up
hands up stays that arms up should be used for when the hands are above eye level. Logically, hands above head fits that criteria. Also, this tag is undistinguishable from arms up right now, so it makes no sense to me to have two tags for the same exact thing.
Obviously hands above head does not apply to characters holding disembodied heads at a lower level, so it should be fine.
Previously discussed in topic #14824, which died because of an argument over using an update instead of an alias.