Add possibility of satellite Icinga nodes

[rubdos]

This is very much based on #12, but it's a lot cleaner. Still need to add the docs. Let me know whether Icinga is interested in merging this.

[aflatto]

Thank you for your contribution.

Yes this is a functionality we will be interested in incorporating, please add the documentation , so we can review the full commit.

[aflatto]

@rubdos Can you please submit the Docs for this change ?

[rubdos]

@aflatto,

@rubdos Can you please submit the Docs for this change ?

I will have time after September 1 to write docs, and I will patch this up a bit too.