[tz] Typo in africa timezone file

[Paul Eggert]

Tim Parenti wrote:
> 24:00 is meant to be quite *un*ambiguous.

"24:00" also has been standardized for many years.  This includes not 
only ISO 8601 but also older standards, going back at least to a 
resolution proposed by the great lunar photographer Lewis Rutherford and 
adopted by the International Meridian Conference in 1884.  See:

http://www.cl.cam.ac.uk/~mgk25/iso-time.html

http://en.wikipedia.org/wiki/24-hour_clock