Add absent prototypes to some core routines.
Also add some port function() to function(void) in some win32 routines.
Also updates the Borland C Makefile for win32.
The inability to wish for a blessed +2 fireproof speed boots really was a bug.
Prefixes are checked for inside a loop which should allow them to be in any
order; for some reason +nnn and empty were outside that loop.
Also adding the secret door detection fix to betabugs 3.3.0. (Is it safe to
hand-modify betabugs 3.3.2?)
