SECRETS: Use HTTP error code 504 when a proxy server cannot be reached Previously, a generic 500 error code was returned. This patch adds a new error message on a failure to contact the proxy server and returns 504, "Gateway timeout" instead. Resolves: https://fedorahosted.org/sssd/ticket/3212 Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>

SECRETS: Use a better data type for ret Normally we use errno_t for return codes and size_t for counting objects. Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>

SECRETS: Add DEBUG messages to the sssd-secrets provider Previously, it was not possible to follow the flow of the secrets responder or find out what went wrong on error. This patch adds DEBUG messages so that most failure cases have their own message. At the same time, running sssd-secrets with debug_level <= 3 does not emit any messages at all. Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>

Secrets: Add Proxy backend Signed-off-by: Simo Sorce <simo@redhat.com> Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>