Leiningen 2.1.0

Closes #18615.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
pinentry 0.8.2

Closes #18605.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
superenv: move MacSystem into separate file

This makes it requirable before superenv becomes active.
superenv: move check logic into superenv?

Fixes #16292.
superenv?: fail when xcode43_developer_dir raises
opencv: fix clt-only builds

Closes #18610.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
play devel 2.1.1-RC1

Closes #18604.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>