Question about toupper and tolower

[Guy Harris]

In V7, "toupper" and "tolower" are macros which don't work if the argument
isn't an alphabetic in the proper (improper?) case.  In the USG UNIX
releases (System III, System V, etc.) those macros have been renamed "_toupper"
and "_tolower", and "toupper" and "tolower" are routines which work correctly
for all characters passed to them (at least, for all 7-bit ASCII characters).

	Guy Harris
	{seismo,ihnp4,allegra}!rlgvax!guy