* northamerica (America/Jamaica): 1974 sprang forward on Jan. 6,

not Apr. 28.
* NEWS: Document this.
* tz-link.htm: Update some links.
* localtime.c (localtime_tzset): Coalesce two identical flag args.

All callers changed.
update geometries with latest shapefiles from http://efele.net/maps/tz/world/
Merge remote-tracking branch 'upstream/master'