SECRETS: Fix a typo in function name s/filed/field/ 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>

Add initial providers infrastructure. Also adds support for the basic LOCAL provider that stores data on the local machine. Signed-off-by: Simo Sorce <simo@redhat.com> Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

Secrets: Add initial responder code for secrets service Start implementing the Secrets Service Reponder core. This commit implements stratup and basic conenction handling and HTTP parsing (using the http-parser library). Signed-off-by: Simo Sorce <simo@redhat.com> Related: https://fedorahosted.org/sssd/ticket/2913 Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>