Networking routing statistics on a per-CPU basis:

Networking routing statistics on a per-CPU basis:

	(a) sysctl node net.route introduced.

	(b) sysctl leaf node net.route.stats can be used for retrieving
	    a cpu indexed array of struct rtstatistics.

	(a) add a function kinfo_get_net_rtstatistics(3), which will be
	    responsible for providing an aggregated view of the routing
	    statistics; part of libkinfo(3).

	(d) adapt netstat(8) to make use of the new libkinfo interface
		for retrieving routing statistics.

Discussed-with:	Jeffrey Hsu <hsu at dragonflybsd.org> (long time ago)