Pull post-4.4BSD change to sys/net/route.c from BSD/OS 4.2.

Have sys/net/route.c:rtrequest1(), which takes ``rt_addrinfo *''
as the argument.  Pass rt_addrinfo all the way down to rtrequest1
and ifa->ifa_rtrequest.  3rd argument of ifa->ifa_rtrequest is now
``rt_addrinfo *'' instead of ``sockaddr *'' (almost noone is
using it anyways).

Benefit: the following command now works.  Previously we needed
two route(8) invocations, "add" then "change".
# route add -inet6 default ::1 -ifp gif0

Remove unsafe typecast in rtrequest(), from ``rtentry *'' to
``sockaddr *''.  It was introduced by 4.3BSD-Reno and never
corrected.

Obtained from:	BSD/OS, NetBSD
MFC after:	1 month
PR:		kern/28360

1 files changed, 3 insertions, 3 deletions

diff --git a/sys/netinet/if_ether.c b/sys/netinet/if_ether.c
index dc662a8..1b654f4 100644
--- a/sys/netinet/if_ether.c
+++ b/sys/netinet/if_ether.c
@@ -116,7 +116,7 @@ SYSCTL_INT(_net_link_ether_inet, OID_AUTO, proxyall, CTLFLAG_RW,
 	   &arp_proxyall, 0, "");
 
 static void	arp_init __P((void));
-static void	arp_rtrequest __P((int, struct rtentry *, struct sockaddr *));
+static void	arp_rtrequest __P((int, struct rtentry *, struct rt_addrinfo *));
 static void	arprequest __P((struct ifnet *,
 			struct in_addr *, struct in_addr *, u_char *));
 static void	arpintr __P((void));
@@ -154,10 +154,10 @@ arptimer(ignored_arg)
  * Parallel to llc_rtrequest.
  */
 static void
-arp_rtrequest(req, rt, sa)
+arp_rtrequest(req, rt, info)
 	int req;
 	register struct rtentry *rt;
-	struct sockaddr *sa;
+	struct rt_addrinfo *info;
 {
 	register struct sockaddr *gate = rt->rt_gateway;
 	register struct llinfo_arp *la = (struct llinfo_arp *)rt->rt_llinfo;