priest/minion bits (trunk only)

priest/minion bits (trunk only)

     Cleanup up a couple of priest and minion allocation/conversion bits.
Also, restrict minion naming so that "guardian <foo>" is only applied when
<foo> is an Angel.  (That restores old behavior from before a change I made
last October; it prevents the guardian Angel from being recognized while
hallucinating.  It probably affects slash'em too, where they have tame
minions besides the astral level's guardian Angel.)