rgw: curl* reuse and for debian, use openssl not gnutls. Reviewed-by: Abhishek Lekshmanan <abhishek.lekshmanan@gmail.com> Reviewed-by: Casey Bodley <cbodley@redhat.com> Reviewed-by: Mark Kogan <mkogan@redhat.com> Reviewed-by: Orit Wasserman <owasserm@redhat.com>