http_auth_challenges_t
http_authorize(conn_t *conn, const char *hdr, http_auth_challenges_t *cs,
http_auth_challenges_t proxy_challenges;
http_auth_challenges_t server_challenges;
http_auth_challenges_t proxy_challenges;
init_http_auth_challenges(http_auth_challenges_t *cs)
clean_http_auth_challenges(http_auth_challenges_t *cs)
http_parse_authenticate(const char *cp, http_auth_challenges_t *cs)