This partially reverts 9029ed933c69287c64a30d40b6b4f9f1ace7dd94 as
`git-instaweb`, which comes with git, needs on gitweb and having them in
separate outputs results in a cycle.
* Make the build system embed the correct path to gitweb into git-instaweb
* Move gitweb fixups to the git expression, to make sure that gitweb
used by git-instaweb is functional
* This will increase the closure size of git, but only with perlSupport
Lots of packages are missing versions in their name. This adds them
where appropriate. These were found with this command:
$ nix-env -qa -f. | grep -v '\-[0-9A-Za-z.-_+]*$' | grep -v '^hook$'
See issue #41007.
