FreeRDP/docs

On an up to date windows machine run the following binary after a build with -DWITH_TIMEZONE_UPDATER=ON (from build directory):

tzextract <path to source>\winpr\libwinpr\timezone

After running the scripts check
 * git clang-format -f to eliminate formatting changes
 * winpr/libwinpr/timezone/WindowsZones.c
for changes.

on any machine run the following script from checkout root:

./scripts/update-windows-zones.py

After running the scripts check
 * git clang-format -f to eliminate formatting changes
 * winpr/libwinpr/timezone/WindowsZones.c
for changes.

Commit if the definitions changed:
1. run `git clang-format -f` on these changed files
2. commit these changes
3. create a pull request at https://github.com/FreeRDP/FreeRDP