This actually silences InsecureRequestWarning.
The Arris SB8200 has 32 downstream channels, but in my experience
report more than that, but the "extra" channels report modulation as
"Other" instead of QAM256. This filters those channels, since they seem
to drive the error count up, but don't provide data.
Signed-off-by: Nathaniel Clark <Nathaniel.Clark@misrule.us>