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.