* sys/netinet6/ip6_{in,out}put.c: implement flow label manipulation   setsockopt, as documented in draft-itojun-ipv6-flowlabel-api-00.txt.   the default value can be switched by net.inet6.ip6.auto_flowlabel.   experimental.
* sys/netinet6/ip6_{in,out}put.c: implement flow label manipulation
  setsockopt, as documented in draft-itojun-ipv6-flowlabel-api-00.txt.
  the default value can be switched by net.inet6.ip6.auto_flowlabel.
  experimental.

nov2000

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame