CHANGES:

• Fix tests when we push to an empty repository (#462, @dinosaure, @ulugbekna)

• Fix new smart tests without a global git config (#463, @sternenseemann, @dinosaure)

• Refactor tests (#464, @ulugbekna, @dinosaure)

• Refactor find_common.ml (#465, @ulugbekna, @dinosaure)

• Some preparation about Git protocol v2 (#466, @ulugbekna, @dinosaure)

• Add HTTP/HTTPS support on the unikernel example (#467, @dinosaure)

• Fix bug about push and capabilities (#468, @dinosaure, @hannesm, @ulugbekna)

• Implement HTTP push and handle username & password in the given Uri.t (#469, @dinosaure)

• breaking changes Commit object must have a double LF to separate the header and the body. This format changes hashes of commit and invalid old commits generated by ocaml-git. It seems that on the Git side, the format is not fully respected - and it's why Git did not complain about that on our tests for a long time.

  However, git fsck does this check and an HTTP push to GitHub run git fsck at the end. To be able to push (or run our unikernel over HTTP/S), we must generate right commits.

  So, we advise users to make a fake commit with Git (git commit --allow-empty -m.) on repositories used by ocaml-git and fetch it with depth:1. Otherwise, this new version of ocaml-git will refute older commits - due to the inherent isomorphism between decoder/encoder in ocaml-git.

  For Irmin users, this breaking changes does not change anything when irmin reformats correctly the message to put the second LF. However, a breaking change exists on the API level when the Git commit (and a Git tag) expects a string option now (instead of a simple `string).

  For more details and tests, see #470 (@dinosaure)