Homebrew/homebrew — pull request #31872 by mikemcquaid (2014-08-25 09:30:13+00:00)
Title: etc.install: handle recursive directory installs.

We need to install the helper module not just on `etc` but also on all
subdirectories of it too. Also, handle the case where we install
a subdirectory with etc.install.

Closes #26145.