router: remove some log spam in send_router_advert()

Both these messages would otherwise be printed on each RA.

Especially the second one merely means that we're follwing the cfg
explicitly set by the user, so they're not very likely to be interested
to know that we're doing what we've been told to do.

Signed-off-by: David Härdeman <david@hardeman.nu>
Link: #358
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

Author: Alphix

src/router.c

@@ -1017,16 +1017,16 @@ static int send_router_advert(struct interface *iface, const struct in6_addr *fr
 		uint32_t valid_lt;
 
 		if (addr->dprefix_len >= 64 || addr->dprefix_len == 0 || addr->valid_lt <= (uint32_t)now) {
-			info("Address %s (dprefix %d, valid-lifetime %u) not suitable as RA route on %s",
-			     inet_ntop(AF_INET6, &addr->addr.in6, buf, sizeof(buf)),
-			     addr->dprefix_len, addr->valid_lt, iface->name);
+			debug("Address %s (dprefix %d, valid-lifetime %u) not suitable as RA route on %s",
+			      inet_ntop(AF_INET6, &addr->addr.in6, buf, sizeof(buf)),
+			      addr->dprefix_len, addr->valid_lt, iface->name);
 			continue;
 		}
 
 		if (ADDR_MATCH_PIO_FILTER(addr, iface)) {
-			info("Address %s filtered out as RA route on %s",
-			     inet_ntop(AF_INET6, &addr->addr.in6, buf, sizeof(buf)),
-			     iface->name);
+			debug("Address %s filtered out as RA route on %s",
+			      inet_ntop(AF_INET6, &addr->addr.in6, buf, sizeof(buf)),
+			      iface->name);
 			continue;
 		}