luci-app-usteer: Add parameters specifically for usteer-ng

[Ramon00]

usteer-ng is the forked version of usteer with more options and improvements.
This commit allows setting the additional options in luci-app-usteer.

Next to that a small bug is fixed.

[systemcrash]

The angle you're going for here is that the new settings work or are benign. How about detecting which agent is installed via a fs.stat or fs.exec command -v and revealing settings based on that result? It might prevent users lodging bug reports 'this setting doesn't work'....

[Ramon00]

I can try to see if fs.stat works

[domingues]

usteer-ng has new default values, probably they should also be reflected here. NilsRo/usteer-ng@b69ac48

Even better is to push for the original project to wake up to life... openwrt/usteer#10

[Ramon00]

I can try to see if fs.stat works

Ok I added an elegant detection

usteer-ng has new default values

Its only 1 parameter, also i cannot really detect what the default is. The only thing I could do is check if one of the other parameters are included and then change the default based on that. But to be honest, I dont think it is that important, especially because usteer-ng is not officially supported. @systemcrash what do you think, also switch on that, or just leave it slightly less complex?

[systemcrash]

Well, you can elide a default for the parameter, and retain whatever value is provided, especially if it's a flag.

We can put this in and see how it fares. master only?

[Ramon00]

Ok i added a switch for that one parameter. Im fine either way, this or the previous version.

[Ramon00]

optimized a bit

[systemcrash]

Merged. Thanks @Ramon00