[tz] proposed changes for Win32 and a improved mktime() algorithm

[Robert Elz]

    Date:        Tue, 9 May 2017 21:48:23 -0700
    From:        Paul Eggert <eggert at cs.ucla.edu>
    Message-ID:  <9b1d76e4-d0d9-09a1-73df-822f3aa85e65 at cs.ucla.edu>

  | What does Android use for mktime? Something slow?

Why does it matter?   If you have an application where the speed of
mktime() is a critical factor, it is probably time to redesign the
algorithm.

kre