a CURLOPT_SRVTAG_GPG_HACK (passed through the the http engine).
* http.h: Allow passing srvtag to http_open and http_open_document.
* http.c (http_open, http_open_document): Allow passing srvtag to
http_open and http_open_document.
curl-shim as it always matches the GnuPG version.
* gpgkeys_curl.c, gpgkeys_hkp.c (main): Show which version of curl
we're using as part of --version.
* gpgkeys_curl.c, gpgkeys_finger.c, gpgkeys_hkp.c, gpgkeys_ldap.c
(show_help): Document --version.
protocol we're about to use is actually available.
* curl-shim.h, curl-shim.c (curl_free): Make into a macro.
(curl_version_info): New. Only advertises "http" for our shim, of
course.
protocols we handle. Directly pass them to curl or fake-curl and see if
an error comes back.
* curl-shim.h, curl-shim.c (handle_error), ksutil.c (curl_err_to_gpg_err):
Add support for CURLE_UNSUPPORTED_PROTOCOL in fake curl.
* Makefile.am: Don't need -DFAKE_CURL any longer since it's in config.h.
