nzbget does not expand OS env vars in nzbget.conf (its ${...} only
references other nzbget options), so the previous secretKeyRef-as-env
approach left the literal ${NEWSHOSTING_USER} in the config and auth
failed with 400 DENIED.
Add initContainers support to the chart and an init step that seds the
Server1 (newshosting) block into nzbget.conf on every start: non-secret
settings in git, username/password from the usenet-creds Secret. Rotating
the secret + restarting re-renders the creds; no password lands in git.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
gilgamezh