Use proper option formatting instead of bullet points.

Simplify Language extension documentation

Avoid spurious warnings from -with-rtsopts (fix #4255)

All kinds of last touches before the 3.8.0 pre-release (backport #8167)

(cherry picked from commit 819c3d56)

(cherry picked from commit f2905fb6)

Update the list of known GHC extensions to match GHC 9.2

GenericPackageDescription and LocalBuildInfo MD5 changed, as
KnownExtensions was modified.

The extensions — all parsing-related — are undocumented and not used in
the wild, but not yet deprecated:
- AlternativeLayoutRule
- AlternativeLayoutRuleTransitional
- RelaxedLayout

Update repo URL in doc example and Drop outdated Hackage vs CPAN package counts

Vilius Panevėžys authored 2 years ago and Mikolaj Konarski committed 2 years ago

The package counts have grown to 15353 and 43351 respectively as of this
writing, hence the ratio has dropped from 5.6 to 2.8. Given the growth
of Hackage, the comparison does not seem as important anymore (does it
matter if you have 3 or 8 alternative libraries for the same purpose?).
Dropping package counts to avoid the need for continuous updates.

Update cabal to officially support GHC 9.2

because we already test 9.2 in CI. This covers

https://github.com/haskell/cabal/wiki/Making-a-release#for-release-for-new-ghc-version

except for #8168, which is pending.

Fix typos in changelog entries

Doc: list-bin does not ensure existence of build products

It was a bit surprising to me that `cabal list-bin foo` prints a path
to an executable `foo` that may not actually exist.

Forwardport 3.8.0

and one other `cabal check` complaint.

Bump cabal-version in the remaining .cabal files and update BSD3 name

Re #7916: undeprecate Distribution.Types.VersionInterval.Legacy

Third party tools like `hackage-cli` rely on this API.
While `Distribution.Types.VersionInterval` does not export the Boolean
algebra operations union, intersection and complement on
`VersionIntervals`, the Legacy variant is still needed.

Fix changelog entries so that changelog-d doesn't croak