Klaus Klein <kleink@netbsd.org> writes:

> Module Name:	basesrc
> Committed By:	kleink
> Date:		Sat Mar 31 18:29:22 UTC 2001
> 
> Modified Files:
> 	basesrc/include: time.h
> 	basesrc/lib/libc/gen: timezone.3 timezone.c
> 	basesrc/lib/libc/time: Makefile.inc localtime.c tzset.3
> Added Files:
> 	basesrc/lib/libc/time: _daylight.c
> 
> Log Message:
> Finally deprecate the old timezone() interface in favor of a XCU5
> timezone/daytime pair, as proposed by J.T. in September, 1996.
> Fixes PR standards/11807 by Ben Harris.

My apologies; it's actually Nick Hudson who submitted the PR (and also
suggested one solution).