Sync zoneinfo database with tz{code,data}2009k from elsie.

Sync zoneinfo database with tz{code,data}2009k from elsie.

africa:         8.21 -> 8.22
asia:           8.35 -> 8.36
europe:         8.21 -> 8.22
leapseconds:    8.8  -> 8.9

zic.c:          8.19 -> 8.20

From Arthur David Olson's comments:

* africa: Change Mauritius to reflect that the 2008-2009 DST experiment
      is not repeated (and to change end of DST in 2009 from 2:00
      standard time to 2:00 local time) (thanks to Steffen Thorsen).

* asia: Arbitrarily cut off Dhaka DST at end of 2009 (so that a POSIX-
      style time zone string can appear in the Dhaka binary file, and
      for the benefit of systems with old glibc reimplementations of
      the time zone library that don't handle permanent DST correctly).
      Note that another change will be needed once the real end date
      for DST in Dhaka is known.

* europe: Update URL for Directive 2000/84/EC on summer-time
      arrangements (thanks to Colin Watson and Ian Jackson).

* leapseconds: Change "no leap second" comment (no leap second at end
      of 2009).

* zic.c: Do not end a binary file with a POSIX-style time zone string
      for locations that end up in permanent DST (thanks to Andreas Schwab).