Add checks to the settings page

[MCMic]

The settings page gives instructions like redis needs to be used, pm.max_children needs to be high, it would be much more useful if it checked the current configuration and show a valid/invalid status instead.

For Redis, I’m pretty sure the application can check if it is configured and show a green/red message depending on the status?

For pm.max_children, it can show the current value for the setting, and maybe calculate how many users it can serve with the current setting.

For proxy buffering and timeout I do not know if this can be checked easily but if it is then it should be as well.

[provokateurin]

At least timeout would be checkable by just connecting to it from the web interface and measuring the time until the connection is closed.
I guess proxy buffering introduces some latency to the requests, but I'm not sure if that is really testable since it could just be a slow internet connection or similar.

[p1gp1g]

Version 1.6.1 of the android app (and 1.6.0 but it there are some bugs) do these checks :)

It checks:

• If the keepalive is too low
• If the request is buffered
• If the connection timeout is too low compared to the keepalive

[provokateurin]

Sounds good, but doing it on the server would also be nice.

[p1gp1g]

I agree, but it is less urgent now :)

BTW, if someone wants to contribute, help is welcome