Replace case with maybe (hlint)
Replace case with maybe (hlint)

    ./src/Action/Server.hs:64:16: Suggestion: Replace case with maybe
    Found:
      case datadir of
          Just d -> return d
          Nothing -> getDataDir
    Perhaps:
      maybe getDataDir return datadir

ndmitchell/hoogle,ndmitchell/hoogle,ndmitchell/hoogle