No way to remove netconfig configuration

[hramrach]

       netconfig modify
               < -s | --service <service name> >
               [ -i | --interface <interface name> ]
               [ -F | --input-format <input/lease file format> ]
               [ -I | --input-file <input/lease file name> ]
               [ -l | --lease-file <input/lease file name> ]
               [ -m | --module-only < name | prefix > ]
               [ -f | --force-replace ]
               [ -v | --verbose ]

       netconfig remove
               < -s | --service <service name> >
               [ -i | --interface <interface name> ]
               [ -m | --module-only < name | prefix > ]
               [ -f | --force-replace ]
               [ -v | --verbose ]

       netconfig update
               [ -m | --module-only < name | prefix > ]
               [ -f | --force-replace ]
               [ -v | --verbose ]

Suppose you are running service foo that installs configuration for interfaces bar and baz, and crashes.

How do you remove the configuration for the crashed service?

Because it crashed you may no longer know that it managed interfaces bar and baz, there is no option to list configuration, no option to remove all configuration for a service.

[hramrach]

Technically the interface name is marked as optional but it's not documented what it means when it is missing:

       modify Modify the current interface and service specific dynamic settings and update the network configuration.

              Netconfig reads these settings on its standard input or from the file specified by the --input-file option and stores them internally until a system reboot or the next modify or remove  ac-
              tion. Already existing settings for the same interface and service combination will be overwritten.  See the MODIFY INPUT FORMAT section for input format description.

       remove Removes the dynamic settings provided by a modify action for the specified interface and service combination and update the network configuration.