Merge pull request #9565 from cabalism/import/pkg-groups

Cabal-QuickCheck/src/Test/QuickCheck/Instances/Cabal.hs

Cabal-tests/tests/CheckTests.hs

.../tests/UnitTests/Distribution/PackageDescription/Check.hs

Makefile

...-install/tests/UnitTests/Distribution/Client/Configure.hs

cabal-testsuite/cabal.project

cabal-testsuite/static/Main.hs

cabal.project

cabal.project.doctest

cabal.project.libonly

cabal.project.meta

cabal.project.release

cabal.project.validate

cabal.project.validate.libonly

cabal.project.weeder

project-cabal/README.md

project-cabal/constraints.config

project-cabal/ghc-latest.config

project-cabal/ghc-options.config

project-cabal/pkgs.config