Remove ocaml-libvhd dependency from xapi

Partial workaround for [xapi-project/libvhd#4]

Signed-off-by: David Scott <dave.scott@citrix.com>
xapi: remove ocaml-libvhd dependency rather than comment it out

Signed-off-by: David Scott <dave.scott@citrix.com>
Remove ocaml-libvhd since it is hard to build.

Completes workaround for [xapi-project/libvhd#4]

Signed-off-by: David Scott <dave.scott@citrix.com>
ffs: correct the tag name (v0.9.25)

Signed-off-by: David Scott <dave.scott@citrix.com>
ffs: install and compress the manpage

This seems to be automatic on CentOS but not on Debian/Ubuntu

Signed-off-by: David Scott <dave.scott@citrix.com>
ffs: update init.d following cmdliner change

Signed-off-by: David Scott <dave.scott@citrix.com>
Merge pull request #538 from djs55/remove-libvhd-xapi

Remove ocaml-libvhd dependency from xapi