Update gnt-cluster man page for removal of --hypervisor-type.

We no longer use a single, cluster-wide hypervisor, but configure the
actual to be used hypervisor on the instance level. The option has already
been removed from gnt-cluster.

Reviewed-by: imsnah

man/gnt-cluster.sgml

@@ -210,7 +210,6 @@
         <command>init</command>
         <arg>-s <replaceable>secondary_ip</replaceable></arg>
         <arg>-b <replaceable>bridge</replaceable></arg>
-        <arg>-t <replaceable>hypervisor-type</replaceable></arg>
         <arg>-g <replaceable>vg-name</replaceable></arg>
         <arg>--master-netdev <replaceable>vg-name</replaceable></arg>
         <arg>-m <replaceable>mac-prefix</replaceable></arg>
@@ -257,17 +256,6 @@
         for instances.
       </para>
 
-      <para>
-        The <option>-t</option> allows to set the hypervisor type of
-        the cluster. Available hypervisor types are: xen-pvm, fake and
-        xen-hvm. The default is the xen-pvm hypervisor.
-        Note that if you init the cluster with hypervisor-type
-        xen-hvm you also need to provide the cluster VNC password
-        file <filename>/etc/ganeti/vnc-cluster-password</filename>
-        because HVM instances require it for VNC console
-        authentication.
-      </para>
-
       <para>
         The <option>-g</option> option will let you specify a volume group
         different than 'xenvg' for ganeti to use when creating instance disks.