Resolves: #1215298
    - Rebase to 2015d
      - Egypt will not observe DST in 2015 and will consider canceling it
        permanently.  For now, assume no DST indefinitely.
      - The abbreviations for Hawaii-Aleutian standard and daylight times
        have been changed from HAST/HADT to HST/HDT, as per US Government
        Printing Office style.  This affects only America/Adak since 1983,
        as America/Honolulu was already using the new style.