Provide a link to help with applying patches

Here is a patch that adds a link to any comment attachment that is a patch.
On drupal.org, the link path would be http://drupal.org/patch/apply :)

This would be an extremely useful feature on d.org, as I have lost count of the number of times this happens:

Poster: HALP! a bug!
Maintainer: Here is a patch. Please test.
Poster: What do I do with this file? (or: 'I put the file in my module directory and nothing happens', etc etc.
Maintainer: (has to link to http://drupal.org/patch/apply yet again....)