Re: Patch to register XmlSyntax and RegularPatterns as known extensions

I'd like to have concrete XML syntax (HSP) and regular expression pattern syntax (HaRP) registered in Language.Haskell.Extension. The attached patch registers XmlSyntax and RegularPatterns as constructors in the Language.Haskell.Extension.Extension data type, along with haddock documentation.

Eh, and to those reading this on the libraries list, the patch was intended for cabal of course. :-) Cheers, /Niklas