adds a config file for each type of resource (usb/pci) by using a 'map'
array propertystring for each node mapping
in each mapping we save the path(s) and some other information to detect
hardware changes (if possible) like the vendor/device id
both configs have custom header parser/formatter to omit the type (since
we only want one type per config here)
also each config has some helpers like find_on_current_node
the resulting config (e.g. for pci) would look like this:
