date: support parsing of ISO-8601-with-"T" dates

Thanks to an improvement in gnulib's parse-datetime module,
commands like this now succeed (output manually indented):
    $ ./date -u -d 2004-02-29T16:21:42.33+07:00 +%FT%T.%N%z
		   2004-02-29T09:21:42.330000000+0000
* tests/misc/date: Add a test to exercise the new-in-gnulib
parsing of ISO8601-with-"T" dates.
* NEWS (New features): Mention it.
* gnulib: Update, to pull in this parse-datetime improvement.

1 files changed, 0 insertions, 0 deletions

diff --git a/gnulib b/gnulib
-Subproject 47cb657eca1abf2c26c32c8ce03def994a3ee37
+Subproject 9926b90d5159916a539b49359b3589fe89c2d98