Revise file locking documentation
Problem to solve
GitLab has supported file locking for a long time for all files. When the Git LFS client introduced file locking support, we implemented the LFS APIs to expose the existing file locking feature. The current documentation reads as though there are two distinct features, when there is one feature.
Proposal
Revise the documentation to better describe it's behavior, and the integration with the Git LFS client.
Links / references
Edited by James Ramsay (ex-GitLab)