mirage-xen.0.9.4 and mirage-xen.0.9.5 need an exact versions of xenstore

Fixes mirage/ocaml-xen-block-driver#2

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Merge pull request #1047 from djs55/mirage-xen-versions

mirage-xen.0.9.4 and mirage-xen.0.9.5 need an exact versions of xenstore
cryptokit and uri are no longer required for dns
Merge pull request #1049 from dsheets/dns.0.7.0

cryptokit and uri are no longer required for dns
new package: omd.0.2 (without test_cow)
Merge pull request #1048 from pw374/master

new package: omd.0.2
Update ocaml-ldap description.

- Fix uninstall rule
- Lighten the version dependency on ocamlnet
Merge pull request #1052 from camlunity/temp

Temp
Merge pull request #1051 from hnrgrgr/master

Update ocaml-ldap description.
Updated Lacaml to version 7.0.8
Merge https://github.com/OCamlPro/opam-repository
Merge pull request #1053 from mmottl/master

Updated Lacaml
Fixed broken MD5-sum (was SHA-1 by accident)
Merge pull request #1054 from mmottl/master

Fixed broken MD5-sum (was SHA-1 by accident)
update bitstring to 2.0.4