[Hackage] #336: --constraint flag only used for configure not for install/upgrade dep planning

[Hackage]

#336: --constraint flag only used for configure not for install/upgrade dep
planning
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  Reporter:  duncan              |        Owner:         
      Type:  defect              |       Status:  new    
  Priority:  normal              |    Milestone:         
 Component:  cabal-install tool  |      Version:  1.2.3.0
  Severity:  normal              |     Keywords:         
Difficulty:  easy (<4 hours)     |   Ghcversion:  6.8.2  
  Platform:                      |  
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 It would be relatively easy to support the `--constraint=DEP` flag as an
 input to install/upgrade dependency planning. We should do it because it's
 useful and it's confusing that it's not supported.

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Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/336>
Hackage <http://haskell.org/cabal/>
Hackage: Cabal and related projects