dirmngr: Implement Tor mode for SRV RRs.
* dirmngr/dns-stuff.c (get_dns_cert): Factor adns init out to... (my_adns_init): new. (getsrv)[USE_ADNS]: Use my_adns_init. (getsrv)[!USE_ADNS]: Return an error if Tor mode is active. * dirmngr/t-dns-stuff.c: Add option --use-tor.
- Signed-off-by: Werner Koch <wk@gnupg.org>