admin: Add virAdmConnectLookupServer

It does not have a suffix ByName because there are no other means of
looking up the server and since the name is known, this should be the
preferred one.

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>

daemon/admin_server.c

@@ -56,3 +56,13 @@ adminConnectListServers(virNetDaemonPtr dmn,
  cleanup:
     return ret;
 }
+
+virNetServerPtr
+adminConnectLookupServer(virNetDaemonPtr dmn,
+                         const char *name,
+                         unsigned int flags)
+{
+    virCheckFlags(flags, NULL);
+
+    return virNetDaemonGetServer(dmn, name);
+}