dirmngr: Add code to support the negotiation auth method.
* dirmngr/http.c (enum auth_negotiate_states): New. (struct proxy_info_s): Add new fields. (release_proxy_info): Free Windows stuff. (proxy_get_token): New. Implemented only for Windows for now. (run_proxy_connect): Add support for auth method Negotiation. (store_header): Keep some header lines separate.
The code does something but I have not yet been able to test it due
to problems setting up Squid with AD authentication. As of now it
will respond with a failure but that should not be worse than not to
Supporting Negotiation using GSS for Unix should eventually also be
- GnuPG-bug-id: T6719