This directory holds the logic for a Fledger Node.
The Node structure sets up the different modules from
flmodules and connects them with each other.
It also creates a NodeData structure that collects
the different statistics from the modules.
In order for NodeData to have the latest statistics
from the modules, it uses the Update messages from
the modules:
on every Update message, the new statistics is copied
to the NodeData structure.
This is done by adding a tap to the corresponding
module-broker, and then going through all messages
to find Updates.
The advantage of this is to have a structure that does
not need to be protected by a Mutex.