charybdis 3.4.2, HEAD

The [charybdis IRC server](http://atheme.org/projects/charybdis.html)

Right now it does not compile with `clang` so I followed the guide and added the `fails_with :clang` block. Then `homebrew-dupes/apple-gcc42` provides a working compiler for it. 

I have tested both 3.4.2 and --head on OS X 10.9.