Interesting. How would that work for clients? If the destination file already exists on the client look for a .zsync on the hosting server, if its not there look for one at https://thirdpartyzsyncs.com?url=someurl ? What happens if the .zsync is out of sync with the resource?
The client, from my very limited testing, expects the url of the zsync file as an input. The zsync file can point to anywhere else for listing the canonical version.
