The block said the token rides stdin and never argv, then handed it to curl as
`-H "X-Plex-Token: $T"` — world-readable in /proc/<pid>/cmdline. It now writes
a mode-600 curl config inside the container, which is also how the overnight
rescan was actually issued (five sections, all accepted). Two truths the old
block got wrong are stated: a section answers 200 with a Directory body when
Accept: application/json is sent, and a backslash-newline inside a quoted
printf format is literal, so the config builder writes two printfs.