Non-versioned haddock.exe is not part of the Windows bindist tarball
The GHC 8.6.3 Windows bindist tarball contained both
ghc-8.6.3/bin/haddock-8.6.3.exe as well as
ghc-8.6.4/bin/haddock.exe. However, the 8.6.4 tarball only contains the executable with a version suffix
ghc-8.6.4/bin/haddock-8.6.4.exe. This broke some users, e.g., the Shake CI https://ci.appveyor.com/project/ndmitchell/shake/builds/22909548\#L971 but also
rules_haskell which assume the existence of that executable.
Assuming this change was not intentional, it would be great if we could get a bindist that contains the unversioned haddock.exe.
Not sure if this is related to #16398 (closed).