I saw this in the YANI archive, and I think it's fairly interesting.
Doppelgangers are known for commiting identity theft, but in NetHack
they function as just another shapeshifter. This commit makes them
a bit more interesting, I think.
Original YANI by aosdict and Andrio.
The mind blast code was previously a part of dochug().
This commit pulls that code into its own function, and also
happens to eliminate a goto and label with no change in functionality.
This commit removes the gotos from set_apparxy, making it easier to read.
It also cuts out at 1-2 variable assignments on certain calls,
so technically it is an efficiency win as well.
According to comments in the code, this feature was disabled
because it never triggered, making it useless. I enabled the code
again, and monsters demonstrated a willingness to zap the player
with wands of teleportation. I am not sure of what exactly changed,
but I think this feature could trigger some interesting situations,
and absolutely deserves to make a comeback.
Kestrel Gregorich-Trevor