configure: Require GnuTLS

We are building with GnuTLS everywhere because GnuTLS is widely
available. Also, it is desirable to prefer cryptographically
strong PRNG over "/dev/urandom" which is just a fallback.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NDaniel P. Berrangé <berrange@redhat.com>

configure.ac

@@ -216,7 +216,6 @@ fi
 # RPC, we don't need several libraries.
 if test "$with_remote" = "no" ; then
   with_libvirtd=no
-  with_gnutls=no
   with_ssh2=no
   with_sasl=no
   with_libssh=no
@@ -250,7 +249,6 @@ LIBVIRT_ARG_DBUS
 LIBVIRT_ARG_FIREWALLD
 LIBVIRT_ARG_FUSE
 LIBVIRT_ARG_GLUSTER
-LIBVIRT_ARG_GNUTLS
 LIBVIRT_ARG_HAL
 LIBVIRT_ARG_LIBPCAP
 LIBVIRT_ARG_LIBSSH

m4/virt-gnutls.m4

@@ -17,10 +17,6 @@ dnl License along with this library.  If not, see
 dnl <http://www.gnu.org/licenses/>.
 dnl
 
-AC_DEFUN([LIBVIRT_ARG_GNUTLS],[
-  LIBVIRT_ARG_WITH_FEATURE([GNUTLS], [gnutls], [check], [3.2.0])
-])
-
 AC_DEFUN([LIBVIRT_CHECK_GNUTLS],[
   LIBVIRT_CHECK_PKG([GNUTLS], [gnutls], [3.2.0])