[libsoup/wip/tpopela/negotiate] Use the gss_import_name just once per connection

[Tomas Popela <tpopela src gnome org>]

commit f1f3a0749f84085ea715edd1c235c08a6a2e80bc
Author: Tomas Popela <tpopela redhat com>
Date:   Tue Jan 19 12:00:55 2016 +0100

    Use the gss_import_name just once per connection
    
    As per https://github.com/krb5/krb5/blob/master/src/tests/gss-threads/gss-client.c#L202

 libsoup/soup-auth-negotiate.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/libsoup/soup-auth-negotiate.c b/libsoup/soup-auth-negotiate.c
index f73aeae..038895b 100644
--- a/libsoup/soup-auth-negotiate.c
+++ b/libsoup/soup-auth-negotiate.c
@@ -41,6 +41,7 @@ typedef struct {
        gss_name_t   server_name;
 
        gchar *response_header;
+       gboolean initialized;
 } SoupNegotiateConnectionState;
 
 static gboolean soup_gss_build_response (SoupNegotiateConnectionState *conn,
@@ -273,7 +274,8 @@ soup_auth_negotiate_class_init (SoupAuthNegotiateClass *auth_negotiate_class)
 static gboolean
 soup_gss_build_response (SoupNegotiateConnectionState *conn, SoupAuth *auth, GError **err)
 {
-       if (!soup_gss_client_init (conn, soup_auth_get_host (SOUP_AUTH (auth)), err))
+       if (!conn->initialized &&
+           !soup_gss_client_init (conn, soup_auth_get_host (SOUP_AUTH (auth)), err))
                return FALSE;
 
        if (soup_gss_client_step (conn, "", err) != AUTH_GSS_CONTINUE)
@@ -468,6 +470,7 @@ soup_gss_client_init (SoupNegotiateConnectionState *conn, const gchar *host, GEr
                goto out;
        }
 
+       conn->initialized = TRUE;
        ret = TRUE;
 out:
        g_free (h);