This module is in charge of relaying BGP updates and announcements between the exaBGP
and the pctrlr module respectively. It receives BGP updates from the exaBGP module and
forwards them to the pctrlr. It also receives announcements from the pctrlr which
it forwards to the exaBGP module.
See examples/test-ms/README.md for an example of how to run xrs along with everything else.