SECRETS: Make use of sss_client_fd_handler()
Let's make use of the sss_client_fd_handler() on sec_fd_handler().
Resolves:
https://pagure.io/SSSD/sssd/issue/3633
Signed-off-by: Fabiano FidĂȘncio <fidencio@redhat.com>
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>