Add mbr-format, xe-unikernel-upload

Signed-off-by: David Scott <dave.scott@citrix.com>
mbr-format: add all the depopts of mirage-types(.lwt)

I need the mirage-types.lwt package, so I need to satisfy the full set
of depopts.

Signed-off-by: David Scott <dave.scott@citrix.com>
mbr-format: depend on cmdliner

Signed-off-by: David Scott <dave.scott@citrix.com>
mbr-format: depend on ocaml >= 4.00.0

Signed-off-by: David Scott <dave.scott@citrix.com>
camlzip 1.04: don't remove zip

camlzip 1.04 provides only the `camlzip` findlib package. I just tested
and it is only 1.05 that provides both `zip` and `camlzip`.
Merge pull request #2471 from djs55/xe-unikernel-upload

Add mbr-format, xe-unikernel-upload
Merge pull request #2472 from agarwal/camlzip

camlzip 1.04: don't remove zip
+ocamlnet.3.7.4-1

Backport "protocol robustness: omitting the port number from the Host
header when it is equal to the protocol-dependent default port"
https://godirepo.camlcity.org/svn/lib-ocamlnet2/branches/onet4@1961
Sync latest compiler pull requests
Merge pull request #2474 from Chris00/master

+ocamlnet.3.7.4-1
Merge pull request #2475 from bactrian/sync-prs-1408489201

Sync OCaml compiler PRs