Must've been updated after I left work on Friday, as I'd been waiting for it.  Proposed patch attached, pulling from NIST.

--
Tim Parenti

On 15 January 2018 at 08:21, R. Bonomi <bonomi@host210.r-bonomi.com> wrote:

The iana.org file only contains info through Bulletin C54, but Bulletin C55
is out.

Reference: the leap-seconds.list file at usno.mil