Sync zoneinfo database with tzdata2006n from elsie.

Sync zoneinfo database with tzdata2006n from elsie.

asia:           8.7 -> 8.8
europe:         8.5 -> 8.6
northamerica:   8.8 -> 8.9
southamerica:   8.4 -> 8.5
zone.tab:       8.4 -> 8.5

This change affects current time stamps:

  Jordan will switch to winter time on October 27, not September 29.
  (Thanks to Hilal Malawi and Steffen Thorsen.)

This change affects only future time stamps:

  Brazil's DST this year is the first Sunday in November to the
  last Sunday in February.  (Thanks to Frederico A. C. Neves.)

This change affects only past time stamps:

  On Sunday Nicaragua switched at 01:00, not 00:00.  (Thanks to
  Jesper Norgaard Welen.)

This change affects other indexing data:

  Serbia has split into two, and now has ISO 3166 codes, so we need a
  new Zone Europe/Podgorica.  (Thanks to Mark Davis.)