Currently, an F4 client is able to request a PUT or PATCH on a repository resource that contains triples with other resources as their RDF subjects.
In these cases, the repository resource that is not the target of the request can be updated.
This is questionable behavior.
This task is to:
1) confirm with the F4 committer team that this behavior should be disabled
2) implement it
Note: Although this issue shows itself in the REST-API, the solution should be deeper within Fedora, i.e. within the kernel.