tzdata; 2016j -> 2017c

Notable recent changes:

- Northern Cyprus resumed EU rules starting 2017-10-29.
- Namibia will switch from +01 with DST to +02 all year, affecting
UT offsets starting 2018-04-01.
- Sudan will switch from +03 to +02 on 2017-11-01.
- Tonga will not observe DST on 2017-11-05.
- Turks & Caicos will switch from -04 all year to -05 with US DST,
affecting UT offset starting 2018-11-04.

pkgs/data/misc/tzdata/default.nix

···
 
 stdenv.mkDerivation rec {
   name = "tzdata-${version}";
-  version = "2016j";
+  version = "2017c";
 
   srcs =
     [ (fetchurl {
         url = "http://www.iana.org/time-zones/repository/releases/tzdata${version}.tar.gz";
-        sha256 = "1j4xycpwhs57qnkcxwh3np8wnf3km69n3cf4w6p2yv2z247lxvpm";
+        sha256 = "02yrrfj0p7ar885ja41ylijzbr8wc6kz6kzlw8c670i9m693ym6n";
       })
       (fetchurl {
         url = "http://www.iana.org/time-zones/repository/releases/tzcode${version}.tar.gz";
-        sha256 = "1dxhrk4z0n2di8p0yd6q00pa6bwyz5xqbrfbasiz8785ni7zrvxr";
+        sha256 = "1dvrq0b2hz7cjqdyd7x21wpy4qcng3rvysr61ij0c2g64fyb9s41";
       })
     ];