mxcl/homebrew — pull request #14993 by zx2c4 (2012-09-17 22:48:24+00:00)
Title: Add .sh to list of valid library extenions.

As discussed with mistym, it's not only compiled code that goes in
/usr/lib, but any types of libraries. As such, .pm was added to the
valid extensions list a while back. Unfortunately, .sh was not added,
even though configuration includes and platform function library shell
files are often put in /usr/lib as shellscript libraries. This patch
adds .sh to the list of valid library extensions.