Generalized Time/UTC Time need leap seconds

[Hallvard B Furuseth <h.b.furuseth@usit.uio.no>]

[Syntaxes] 4.3.13 (Generalized Time) says:

      second  = %x30-36 %x30-39                        ; "00" to "59"

That should be "00" to "60", since Coordinated Universal Time has
leap seconds.  See e.g. <http://tycho.usno.navy.mil/systime.html>.

-- 
Hallvard