[tz] tzfile(5)

All, Is https://github.com/eggert/tz/blob/master/tzfile.5 the normative reference for the binary format of tzdata? I thinking about writing an I-D to register application/tzfile as a MIME type for use with TZDist <https://tools.ietf.org/html/rfc7808> and I obviously need a reference to the file format.  Or should I document the format in the draft?  Does anyone want to suggest a different name for the format? -- Kenneth Murchison Cyrus Development Team FastMail Pty Ltd