move bogus god name generator to hallucination.c

also - remove softcoding name of Moloch
Make hallucinatory priests & guardians more so.

from http://gitorious.org/nitrohack/ais523/commit/7c182f87e2454cc2f8da3d81c7390b4746bbcf40 by Sean Hunt and http://bilious.alt.org/?275 by Gregor Jochmann
+comment
rodent of unusual size soon will be a real monster