mackup 0.5.3

Closes #24669.

Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Closes #24669.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
pam-yubico: fix checksum

Also use github tarball, why not.

Fixes #24663.
cmus: optional ffmpeg dependency

Fixes error described in cmus/cmus#58

Closes #24652.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
safer check for sys.executable in sitecustomize.py

make sure it doesn't actually point to something else

since sitecustomize.py is put in a location found by pypy,
it breaks pypy by setting sys.executable to a path that is definitely wrong,
and may not even exist.

Closes #24581.

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