The previous macro was confusing to some, and did not include "cygwin" in
its name. The updated name more clearly expresses a choice of the
win32api implementation that shipped with version 1.5 of cygwin.
Signed-off-by: Mark Levedahl <mlevedahl@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>