Pass OCM test suite

[michielbdejong]

A number of changes in this PR:

• #1752 spell 'endpoint' instead of 'endPoint'
• #1753 support JSON for POST bodies in the OCM API
• #1962 support running the rhttp service with TLS
• #1981 support remote resource identifiers that don't contain a :
• support running the ocm service on the domain root

Some of these changes are technically breaking changes (especially the last two) so deploy with care.

[update-docs[bot]]

Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would create a changelog item based on your changes.

[michielbdejong]

Closing as stale.