[GHC] #5223: Make interruptProcessGroupOf interrupt the current process group

[GHC]

#5223: Make interruptProcessGroupOf interrupt the current process group
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    Reporter:  Favonia           |       Owner:  Favonia                
        Type:  feature request   |      Status:  new                    
    Priority:  normal            |   Component:  libraries/process      
     Version:  7.0.3             |    Keywords:  interrupt process group
    Testcase:                    |   Blockedby:                         
          Os:  Unknown/Multiple  |    Blocking:                         
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown           
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 Make {{{interruptProcessGroupOf}}} interrupt the current process group of
 the target process under POSIX, instead of assuming the argument is the
 lead process. This requires the new API {{{getProcessGroupIDOf}}} in the
 unix library. (See #3994 for more information for
 {{{interruptProcessGroupOf}}} and #5167 for {{{getProcessGroupIDOf}}}.)

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5223>
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