gpg: Report a conflict between honor-keyserver-url and TOR.
* g10/call-dirmngr.c (create_context): Send option and print a verbose error.
It is in general a bad idea to use honor-keyserver-url but if Dirmngr
is running in TOR mode we should not allow this option at all. We let
Dirmngr know about the use of this option and let Dirmngr tell use
whether TOR mode is active so that we can print a hint to disable that
keyserver option.
A future extension in gpgconf may disable that option directly but a
user may still override that and thus we better check.
- Signed-off-by: Werner Koch <wk@gnupg.org>