maint: Post-release version bump to 5.1.0

Signed-off-by: NJán Tomko <jtomko@redhat.com>

configure.ac

@@ -16,7 +16,7 @@ dnl You should have received a copy of the GNU Lesser General Public
 dnl License along with this library.  If not, see
 dnl <http://www.gnu.org/licenses/>.
 
-AC_INIT([libvirt], [5.0.0], [libvir-list@redhat.com], [], [https://libvirt.org])
+AC_INIT([libvirt], [5.1.0], [libvir-list@redhat.com], [], [https://libvirt.org])
 AC_CONFIG_SRCDIR([src/libvirt.c])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_HEADERS([config.h])

docs/news.xml

@@ -33,6 +33,14 @@
      -->
 
 <libvirt>
+  <release version="v5.1.0" date="unreleased">
+    <section title="New features">
+    </section>
+    <section title="Improvements">
+    </section>
+    <section title="Bug fixes">
+    </section>
+  </release>
   <release version="v5.0.0" date="2019-01-15">
     <section title="New features">
       <change>