What does this change?
* Remove use of spaces for formatting
These could be found by using `grep -r -l -P '^\t+ +[^*]'
* Removal of training whitespaces
* A few lines longer than 120 chars
This replaces the previous "dummy" CheckCommand, and the user won't
notice it. Provided performance data will be parsed the same way.
This saves a shell fork and check_dummy execution.
We're relying on this when creating cluster checks with Icinga 2 DSL
and more. If one does not have the plugins installed, this then also works.
fixes#5740