Wizard mode monster creation underwent several changes for 3.4.0
(explicitly create "tame <monster>", create a monster by class letter,
repeat the creation for N monsters) and one of them rendered the check
to prevent creating orphaned shopkeepers, temple priests, vault guards,
and worm tails inoperative. Put that back, and extend the control to
allow you to specify "peaceful <monster>" and "hostile <monster>" too.
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