policycoreutils: sandbox: add -C option to not drop all capabilities

Some sandbox might want to be able to run a suid app.  Add the -C option
to allow capabilities to stay in the bounding set, and thus be allowed
inside the sandbox.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Dan Walsh <dwalsh@redhat.com>
4 files changed