Fix URL for test pkg.
give pair? the same treament as list? got in 9ee9f676
moved follow-log around so that I can get performance
feedback from people without asking them to install
the drracket-test pkg
remove bad init argument

closes PR 14856
Add additional pkgs to test in DrDr.
Split DrDr2 from the main repository.

The `drdr2` pkg is now at
  https://github.com/racket/drdr2
Split drdr from the main repository.

The `drdr` pkg is available at:
  https://github.com/racket/drdr

The pkgs.rktd file is kept to manage the pkgs built
by DrDr on each push.
Split `pkg-build` from the main repository.

The `drdr2` pkg is now at
  https://github.com/racket/pkg-build
Split the `games` collection out of the main repository.

The `games` collection is now at
  https://github.com/racket/games
Remove split collections from props script.
Split `meta/new-web` from the main repository.

Source for the racket-lang.org web pages is at
  https://github.com/racket/racket-lang-org
Avoid error on relative paths in `raco pkg install --clone`.
Add dependencies of s3-sync.
Split `meta/pkg-push` from the main repository.

Source for `pkg-push` is now at
  https://github.com/racket/pkg-push
Add missing "sha" pkg.
Split `distro-build` and `remote-shell` pkgs from the main repository.

`distro-build` is at:
  https://github.com/racket/distro-build
`remote-shell` is at:
  https://github.com/racket/remote-shell
Run distro-build and remote-shell on drdr.
Split `plt-web` from the main repository.

Source for `plt-web` is now available at:
  https://github.com/racket/plt-web
Fix test that used `distro-build`.
Split `slatex` from the main repository.

Source for `slatex` is now available from:
  https://github.com/racket/slatex/