wks: Add new commands --install-key and --remove-key to the client.
* tools/gpg-wks-client.c (aInstallKey, aRemoveKey, oDirectory): New. (opts): Add "--install-key", "--remove-key" and "-C". (parse_arguments): Parse them. (main): Check that the given directory exists. Implement the new commands.
These commands maybe useful to prepare a WKD directory on a non-Unix
box using the standard wks client.
- Signed-off-by: Werner Koch <firstname.lastname@example.org>