[GHC] #7985: Allow openFile on unknown file type

[GHC]

#7985: Allow openFile on unknown file type
-----------------------------+----------------------------------------------
Reporter:  singpolyma        |          Owner:                  
    Type:  bug               |         Status:  new             
Priority:  normal            |      Component:  libraries/base  
 Version:  7.6.3             |       Keywords:                  
      Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
 Failure:  None/Unknown      |      Blockedby:                  
Blocking:                    |        Related:                  
-----------------------------+----------------------------------------------
 There should be an "unknown" file type, to allow for special file types to
 be opened without an exception.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7985>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler