Missing content_lock.api.php

Problem/Motivation

The module provides multiple hooks, however none are documented in the content_lock.api.php file.

On a side note, I'm aware that there's a content_lock_entity_lockable hook, however it doesn't provide a way for third party modules with custom operations to alter the behaviour of the lock (e.g. in order to opt out).

Is this an intentional design decision?

Steps to reproduce

N/A

Proposed resolution

Create the content_lock_entity_lockable.api.php file with documentation for the appropriate hooks.

Remaining tasks

Provide a patch and commit.