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QNAP 5.x works much better if we let Apache proxy tailscale web, which means the URLs can no longer be relative since apache sends us an internal URL. Access QNAP authentication via http://localhost:8080/ as documented in https://download.qnap.com/dev/API_QNAP_QTS_Authentication.pdf Signed-off-by: Denton Gentry <dgentry@tailscale.com>