Don't redistribute RTPROT_BOOT.

kernel.c

@@ -742,10 +742,11 @@ filter_kernel_routes(struct nlmsghdr *nh, void *data)
 
     if(nh->nlmsg_type != RTM_NEWROUTE)
         return 0;
+
     rtm = (struct rtmsg*)NLMSG_DATA(nh);
     len -= NLMSG_LENGTH(0);
 
-    if(rtm->rtm_protocol == RTPROT_BABEL)
+    if(rtm->rtm_protocol == RTPROT_BOOT || rtm->rtm_protocol == RTPROT_BABEL)
         return 0;
 
     if(rtm->rtm_dst_len > maxplen || rtm->rtm_src_len != 0)