202 Accepted response to Update

[bismark]

Per the spec:

If the update operation caused the URL of the post to change, the server must respond with HTTP 201 and include the new URL in the HTTP Location header.

Just like the create operation a server may want to asynchronously create the post at this new URL, so allowing for a 202 to mirror create seems useful.

[jamietanna]

I would also like this to be possible, as my server works asynchronously (as it interacts with a static site which needs a rebuild before changes can take effect)