[PATCH] stpcpy comes from Turbo C [BZ #3629]

[Roland McGrath]

I certainly don't think we need to give exact history on the provenance of
each interface.  A simple statement about current standards is good.  But
that could give the erroneous impression that stpcpy was not available in
the GNU C Library before it supported POSIX.1-2008.  (In fact, AFAICT
stpcpy has been in libc since before its first release.)

How about this?

	This function is part of POSIX.1-2008 and later editions, but was
	available in @theglibc{} and other systems as an extension long
	before it was standardized.

I didn't say "GNU extension" to avoid the implication that we were its
inventors.


Thanks,
Roland