command consistency

[adahbingee]

Please make the command logic consistent.
Should use stream instead of Stream.

[fstenico]

I totally quote your comment...
I spent a couple of days trying to figure out why I could not set CAF to work when I tried "GET /ctrl/set?live_caf=On" or "GET /ctrl/set?live_caf=Off" and it worked!

[milliyang]

Yes. Stupid history reason. to support the E1 model.

it should support both Stream0 and stream0.