Writes directly to KOReader's opds.lua settings so the user
doesn't have to type the long URL. Also updates the manual
menu item to auto-configure instead of showing the URL.
Instead of showing a long auth URL that's impractical to type on
e-ink, tell users to open their Bookhoard web UI and approve from
Device Management. Uses persistent InfoMessage (no timeout) so
the message stays visible while they switch devices.
pcall wraps socket.http.request returns as:
true, 1, status_code, headers, status_line
The old code captured '1' as the status code instead of
the actual HTTP status. Added '_' to skip the first return.
john-okeefe