* Makefile        Change LOCALTIME default from "Factory" to "GMT";
                  do not compile "factory" file
                  (but keep it in the distribution).
* Theory          Remove reference to "Factory" zone.
* localtime.c     Initialize ttinfo structures filled by tzparse
                  (thanks to Ravindra for reporting a valgrind warning).
* zic.c           Fix generation of POSIX strings for zones with
                  rules using "weekday<=n" forms of dates
                  (thanks to Lei Liu for finding the problem).
                  Also, limit output for non-POSIX-specificable zones
                  defined to follow the same rules every year.
                  (Note that no zones of either of the above types
                  appear in the distribution; these changes cater to
                  add-on zones).

Obtained from:	ftp://elsie.nci.nih.gov/pub/

localtime.c - more core dump avoidance work

  * asctime.c - Set errno to EINVAL and return
    "??? ??? ?? ??:??:?? ????\n"
    if asctime_r is called with a NULL struct tm pointer.
    (Note that asctime_r is called by ctime_r and asctime;
    asctime is called by ctime.)
  * localtime.c - Set errno to EINVAL and return WRONG
    if time1 is called with a NULL struct tm pointer;
    avoid dereference if a NULL struct tm pointer is
    passed to timelocal, timegm, or timeoff.
    (Note that time1 is called by mktime,
    timegm, and timeoff; mktime is called by timelocal.)

Obtained from:	ftp://elsie.nci.nih.gov/pub/

Unused:
- Updates to tz-link.html and tz-art.htm
- Typo in tzfile.5.txt

zic:
- Fix URL / reference to Calendrical Calculations: Third Edition

libc/stdtime:
- Fix typo in tzfile.5

- Clarify the license for the tzcode: public domain

Obtained from:	ftp://elsie.nci.nih.gov/pub/

Obtained from: ftp://elsie.nci.nih.gov/pub/

imported sources.