Clean up c_permit values of deity commands

Clean up c_permit values of deity commands

A player may execute a command when his player->nstat has all the bits
in the command's c_permit.

Normal player commands require bit(2).  Command break requires bit(1),
and execute requires bit(5).  Deity commands require both bit(2) and
bit(3).  Works, because deities always have both bits set in nstat, as
they may execute normal player commands, too.  But it's a bit
confusing.  Change them to only require their own bit(3).