Adding connection details to Response object

[hhartzer]

I'm interested in having a way to know if a response was returned via IPv4 or IPv6, to know if the user has IPv6 connectivity or not. This may have some grey areas, like when using a proxy, but otherwise should be somewhat predictable.

This could be something like Response.connection, an object with details about the connection used to receive the response. Or Response.host, the IP address of the host which it communicated.

Not sure how difficult this would be, nor how applicable to other users, so I figured I should ask about it here.