Rails 1.2.3 eTag patch

Rails Edge changeset 6158 added automatic eTag support. I needed it in a Rails 1.2.3 project, so I made a little patch to shoehorn 6158 into 1.2.3.

Here’s the patch, just drop it into lib and require it.

Updated: includes 7580 too.

Updated again: I’m having some issues with this, so looks like I blogged it pre-maturely.