Homebrew/homebrew — pull request #26644 by g-nix (2014-02-12 01:36:53+00:00)
Title: Add formula for ksh. (Like bash, system ksh is outdated).

The download/build/install mechanism is extremely funky — if there is a better way to do this, please advise.

Also, I'm submitting this to mainline instead of dupes in light of bash being a mainline formula, since it seems analogous.