Remove Fhs.vardir

Signed-off-by: Jon Ludlam <jonathan.ludlam@eu.citrix.com>
Remove Fhs.etcdir

Note that for XenServer, we'll have to arrange for a symlink

Signed-off-by: Jon Ludlam <jonathan.ludlam@eu.citrix.com>
Use Xcp_service.configure

Signed-off-by: Jon Ludlam <jonathan.ludlam@eu.citrix.com>