mxcl/homebrew — pull request #11955 by docwhat (2012-04-30 00:07:14+00:00)
Title: zsh: support site specific files (try 2)

This fixes the `site-scripts` and `site-functions` directories
so that zsh points to the HOMEBREW_PREFIX version of these files
instead of the Cellar version.

This means you can drop files in these directories and the files
will persist when you upgrade zsh. Otherwise they disappear when
you upgrade zsh.

Sorry about closing pull request #11936 -- I didn't meant to. I just borked my push. :-(