Merge pull request #1635 from mirage/master

+nbd.1.0.0
update nbd to 1.0.1 (1.0.0 was broken)
Merge pull request #1638 from djs55/nbd.1.0.1

update nbd to 1.0.1 (1.0.0 was broken)
re2 109.55.04
Merge pull request #1639 from janestreet/re2-fix

re2 109.55.04
Add 4.01.0+open-types
Merge pull request #1640 from lpw25/master

Add 4.01.0+open-types
+ocp-ocamlres
added checksum
Merge pull request #1637 from klakplok/master

New package ocp-ocamlres