patch applied (packages/Cabal): Allow '_' char in buld tool names

[Ian Lynagh]

Wed Mar 19 04:53:23 PDT 2008  Duncan Coutts <duncan at haskell.org>
  * Allow '_' char in buld tool names
  eg we have build-tools like "pg_config"

    M ./Distribution/ParseUtils.hs -1 +4

View patch online:
http://darcs.haskell.org/packages/Cabal/_darcs/patches/20080319115323-adfee-044159d77e68b54cf29aecc3a38d67e27c4e8656.gz