job@ modified src/usr.sbin/{rtrd,rtrctl}/*: Import rtrd(8), an easy-to-use RPKI-To-Router protocol implementation

The rtrd(8) program is intended as a scalable distribution layer to deliver data produced by rpki-client(8) to clients such as bgpd(8) in multi-node/multi-vendor IXP and ISP deployments.
A single rtrd(8) instance can concurrently serve many BGP routers and route servers.

Many thanks to Ralph Covelli from Hurricane Electric for creating rtrd!

OK deraadt@ claudio@

#RPKI #BGP