BUILD: Do not build the secrets responder by default
The secrets responder is now built only conditionally and defaults to
'do not build'. However, libsss_secrets.so is built whenever either KCM
or secrets are selected.
The KCM secrets responder tests are skipped if the secrets responder is
not built.
This patch also avoids two BuildRequires in the default set,
libcurl-devel and http-parser-devel are no longer required by SSSD.
Related:
https://pagure.io/SSSD/sssd/issue/3685
Reviewed-by: Fabiano FidĂȘncio <fidencio@redhat.com>