genociding mindflayers

When looking at name_to_mon() to teach it how to cope with possessive
suffices, I discovered that it already knows how.  But while looking at
it, I remembered a newsgroup complaint from a while back by someone who
accidentally committed suicide by attempting to genocide "master mindflayers"
(when he meant "master mind flayers").  name_to_mon() didn't recognize that
misspelling but it did match "master" as a role title.  Unfortunately for
the player, his character was a monk; the game allowed him to genocide his
own role and he died.  That's kind of harsh for such a likely misspelling.
(I don't think a monk is very likely to ever use "master thief" as a mistake
for "master of thieves", but catch that one too just in case.  Conversely,
recognize "master of assassins" as an alternate for "master assassin".)

     Also, wishing for "the <something>" strips off "the" and finds (or not)
<something>, but genociding didn't.  You could specify "a wolf" to wipe out
all wolves, but "the wolf" yielded "such creatures don't exist", and ^G had
similar unfriendly behavior.  This extends name_to_mon() to handle it.

doc/fixes34.4

@@ -174,6 +174,7 @@ Call command could be used to remotely identify which high priest is which
 large amorphous, whirly, noncorporeal, or slithy creatures can fit through
 	tight diagonal gaps despite their size
 avoid "You summoned it!" for unseen monster produced by same-race offering
+recognize "mindflayer" as an alternative spelling for "mind flayer"
 
 
 Platform- and/or Interface-Specific Fixes