File _service of Package libusb-dev

<services>
  <service name="download_url"><param name="path">/ubuntu/natty/+source/libusb/2:0.1.12-17/+files/libusb_0.1.12.orig.tar.gz</param><param name="host">launchpad.net</param></service>
<service name="download_url"><param name="path">/ubuntu/natty/+source/libusb/2:0.1.12-17/+files/libusb_0.1.12-17.diff.gz</param><param name="host">launchpad.net</param></service><service name="download_url"><param name="path">/ubuntu/natty/+source/libusb/2:0.1.12-17/+files/libusb_0.1.12-17.dsc</param><param name="host">launchpad.net</param></service></services>