The operator connection printer module is primary intended for debugging
purposes.
It accepts all incoming operator connections and prints events received
to standard output.
It also replies with a sound play request on connection and in
response to the key events 7 and 9.
Key event # closes the connection.
The configuration of the operator connection printer module with name
NAME is located in the opprinters/NAME
subdirectory.
There are no further configuration files, i.e. the subdirectory for an operator connector module is empty.
The name of the operator connection interface provided by this module
is the module name, i.e., opprinters/NAME.