cabaf3268b
This does not implement any actual PROPPATCH logic, but makes the server return a proper multistatus response with errors for each property instead of a generic HTTP error. It also adds the distinction between requests to the address book and those to other resources. In CardDAV, only the address book itself has properties that make sense to change via PROPPATCH. Those are responded to with a 501, indicating that this needs further implementation. Requests to other resources return 405 for each property, indicating that the resources do not support PROPPATCH at all.
