haskell/hackage-server — pull request #243 by gintas (2014-07-17 23:07:11+00:00)
Title: Removed support for ETags from serveTarball.

I spent some time converting some legacy etag code, until I realized that the code was actually bogus. It uses the tarball's ETag for individual files from inside the tarball. This can't be right (and a plain conversion to useETag would have resulted in a bug from overeager cache hits).

According to grep these are the last instances of manual handling of ETags in hackage.