patch applied (ghc): Add more documentation for interruptible foreign calls

[Simon Marlow]

Thu Oct 14 01:42:53 PDT 2010  Simon Marlow <marlowsd at gmail.com>
  * Add more documentation for interruptible foreign calls

    M ./docs/users_guide/ffi-chap.xml -1 +81

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20101014084253-12142-6af6208da831e5bcec84907ad1aaad02586dd66c.gz