Comment 1 for bug 966253

In MP https://code.launchpad.net/~rharding/convoy/add_listmod_header/+merge/94437 it was brought up that due to issues syncing various front ends, it's actually preferable to provide etag headers that are the hash of the content. This might be another way to go, but it would require changing convoy from being a streaming response to holding the contents in memory in order to calculate the hash of the content.