cabal-install-3.4.0.0-rc3 and Cabal-3.4.0.0-rc3 are now available

[Oleg Grenrus]

The Cabal developers are happy to announce the third release candidate
for cabal-install-3.4.0.0

The corresponding tag are `cabal-install-3.4.0.0-rc3` and
`Cabal-3.4.0.0-rc3`

    https://github.com/haskell/cabal/releases/tag/cabal-install-3.4.0.0-rc3
    https://github.com/haskell/cabal/releases/tag/Cabal-3.4.0.0-rc3

and there is a handful of binaries available at

    https://oleg.fi/cabal-install-3.4.0.0-rc3/
 
Ubuntu-16.04 bindist should work on most recent Linux distributions,
(requires at least kernel 3.15, compiled against glibc-2.23).
Similarly darwin-sierra bindist should work on newer macOSes as well.

Since the second release candidate (rc2) following issues were resolved:

- Regression in cabal repl handling of `-z` flag
  https://github.com/haskell/cabal/issues/7039
- Allow Win32-2.9.0.0
  https://github.com/haskell/cabal/issues/7040
- v2-update updates file+noindex repositories cach
  https://github.com/haskell/cabal/issues/7061
- Fix cabal sdist issues for packages with data-files
  https://github.com/haskell/cabal/issues/7028

Since the first release candidate (rc1) following issues were resolved:

- Bump process version required for job support to 1.6.9
  https://github.com/haskell/cabal/issues/6986
- GHC-8.12 is GHC-9.0
  https://github.com/haskell/cabal/issues/7019
- cabal-install-head v2-install fails to process source-repository-package
  https://github.com/haskell/cabal/issues/7007

cabal-install-3.4 release highlights are:

- Support for upcoming GHC-9.0
- Removal of sandboxes
- Improved public sublibrary support
- `active-repositories` configuration
- Various `cabal init` improvements
- Various `cabal sdist` improvements
- `source-repository-package` are not treated as local packages
- Added `list-bin` command

Complete release notes (drafts) are at:
https://github.com/haskell/cabal/tree/master/release-notes

Please do test this release and let us know if you encounter any issues:
https://github.com/haskell/cabal/issues

- Oleg