zebra: return route_node from rib_match_ipv4_safi

The multicast code needs to know the route_node in addition to the rib
entry in order to perform distance or prefix-length comparisons.  Add it
as optional "out" pointer parameter.

Cc: Everton Marques <everton.marques@gmail.com>
Cc: Balaji G <balajig81@gmail.com>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
3 files changed