Env flag a SPAWNER sets when the runtime is wrapped in a real container.
Declared by the spawner, never inferred by the guest: "am I a guest" and
"am I contained" are different questions, and the subprocess backend runs
a guest with no container around it at all.
Env flag a SPAWNER sets when the runtime is wrapped in a real container. Declared by the spawner, never inferred by the guest: "am I a guest" and "am I contained" are different questions, and the subprocess backend runs a guest with no container around it at all.