The control framework allows changing the behavior of a running SimTree process
(the controlled instance) by sending control requests to this controlled instance
from another SimTree instance (the controlling instance). The controlled and the
controlling instance of SimTree must run on the same host.

The controlling instance is called with the SimTree command [@c]control.
This command requires at least the option [@o]--control-command with exactly one argument. This
argument defines the request which is sent to the controlled instance. Depending on
the kind of the request additional options to the control command are allowed or required.

The request consists of at least two parts (the control object and the control method) and optional further parameters
for the control method. The object and the method are separated with a ., optional parameters
are appended to this string separated with -.

For examples of control commands see the SimTree command [@c]control and the option [@o]--control-command. 