Function the() wasn't supposed to be used for monsters because many
of the ones with capitalized names confuse it, but over time multiple
instances of the(mon_nam()) have crept into the code. Instead of
ripping those out, modify the() to handle that situation better.
Pull request #636 by entrez dealt with this with one extra line of
code, but could end up scanning all the names in mons[] repeatedly
if the("Capitalized string") gets called a lot. This uses a similar
one line fix but calls a whole new routine that scans through mons[]
once collecting all the relevant special case names. As a bonus,
it does the same for hallucinatory monster names which name_to_mon()
couldn't handle.
Fixes#626
b2d4b77d3a