master updated (fcad41c -> a391ffa)

[Paul Eggert]

eggert pushed a change to branch master.

      from  fcad41c   Add tests for version comparison predicates
       new  9c576c2   Fix parse-time-string bug with ISO 8601 defaults
       new  a391ffa   Fix iso8601-parse so unknown DST is -1, not nil


Summary of changes:
 doc/lispref/os.texi                 |   3 +-
 lisp/calendar/iso8601.el            |   8 +-
 lisp/calendar/parse-time.el         |   2 +-
 lisp/calendar/time-date.el          |  17 ++---
 test/lisp/calendar/iso8601-tests.el | 142 ++++++++++++++++++------------------
 5 files changed, 88 insertions(+), 84 deletions(-)