Fix pppoe(4) with rdomain != 0

[Martin Pieuchot]

ok?

Index: net/if_pppoe.c
===================================================================
RCS file: /home/ncvs/src/sys/net/if_pppoe.c,v
retrieving revision 1.40
diff -u -p -r1.40 if_pppoe.c
--- net/if_pppoe.c      12 Jul 2014 18:44:22 -0000      1.40
+++ net/if_pppoe.c      13 Aug 2014 09:56:16 -0000
@@ -1398,6 +1398,9 @@ pppoe_send_padt(struct ifnet *outgoing_i
        memcpy(&eh->ether_dhost, dest, ETHER_ADDR_LEN);
 
        m0->m_flags &= ~(M_BCAST|M_MCAST);
+       /* encapsulated packet is forced into rdomain of physical interface */
+       m0->m_pkthdr.ph_rtableid = outgoing_if->if_rdomain;
+
        return (outgoing_if->if_output(outgoing_if, m0, &dst, NULL));
 }