mighttpd2 3.2.0 (new formula)

This adds [mighttpd2][], a high-performance HTTP server for static files and CGI
scripts, written in Haskell.

[mighttpd2]: http://mew.org/~kazu/proj/mighttpd/en/
Include the binary location:

```ruby
system "#{bin}/mighty-mkindex"
```