Merge pull request #4527 from hvr/wip/issue-3581

Cabal/Distribution/Simple/Configure.hs

Cabal/Distribution/Simple/Setup.hs

Cabal/changelog

cabal-install/Distribution/Client/Config.hs

cabal-install/Distribution/Client/Configure.hs

cabal-install/Distribution/Client/Dependency.hs

cabal-install/Distribution/Client/Install.hs

cabal-install/Distribution/Client/ProjectConfig.hs

cabal-install/Distribution/Client/ProjectConfig/Legacy.hs

cabal-install/Distribution/Client/ProjectConfig/Types.hs

cabal-install/Distribution/Client/ProjectPlanning.hs

cabal-install/Distribution/Client/Setup.hs

cabal-install/Distribution/Client/Types.hs

cabal-testsuite/PackageTests/AllowNewer/setup.cabal.out

cabal-testsuite/PackageTests/AllowNewer/setup.out

cabal-testsuite/PackageTests/AllowNewer/setup.test.hs

cabal-testsuite/PackageTests/AllowOlder/Setup.hs

cabal-testsuite/PackageTests/AllowOlder/cabal.project

cabal-testsuite/PackageTests/AllowOlder/cabal.test.hs

cabal-testsuite/PackageTests/AllowOlder/setup.cabal.out