Add RecommendedServerIssue for connection problems

[nielsvanvelzen]

Right now connection issues are emitted as MissingSystemInfo, with the throwable pointing to an ApiClientException with a cause containing the actual exception emitted from OkHttp.

This can be made better/easier.

I'd suggest creating a new issue type "NoConnection". It should contain the throwable and an enum explaining what went wrong with the connection: bad SSL, no internet etc.