Write meaning of more exit codes in log and improve existing ones

[AlCalzone]

Currently, when an adapter restarts or quits, the numeric error code is written in the log and sometimes a meaning is added. Without looking in the sources, one does not always know what that means. E.g.:

system.adapter.cloud.0 terminated with code 156 ()

Some examples:

Code 0

Current explanation: OK Should be: Planned shutdown or restart

Code 7

Current explanation: Adapter already running Should be: Another process for this instance is running in the background.

Code 156 (-100 in code)

Current explanation: none

Problematic ones (like code 7) should include a link to the documentation with tips how to solve it. Should be: Scheduled restart

[Apollon77]

How do we want to proceed here?

[foxriver76]

Anything else we should add for the exit codes or ok now?

[Apollon77]

@AlCalzone What do you think?

[AlCalzone]

What are we logging now?

[Apollon77]

aaahhh ok, np I think there is not much changed ... so idea would be to add "exit code specific error infos texts"?