Add V4L options to input_uvc.so

[virtuald]

This allows one to set the more common V4L settings from the command line, instead of having to go through the web interface to set them (as they don't persist).

[jacksonliam]

Hey, thanks for this! I just have a few questions,

Did you write the specifically or is this patch from somewhere else? If it's from somewhere else do you have a link?

How come some of the logs have been changed from DBG to LOG? They look pretty DBG to me!

Cheers, Liam

[virtuald]

I wrote this patch.

There are a lot of places where mjpg-streamer will fail to do something silently without telling you that a failure occurred -- which makes it maddeningly difficult to figure out whether something worked or not. Especially things like "setting out of range" (line 663) would be useful for a user to see if they pass an invalid setting on the command line (or set it via the control page).

[jacksonliam]

Thanks, nice work!