bfdd: add BFD package

Bidirectional Forwarding Detection (BFD) is a network protocol that is used to
detect faults between two forwarding engines connected by a link.

Signed-off-by: Lucian Cristian <lucian.cristian@gmail.com>

net/bfdd/files/bfdd.init

@@ -0,0 +1,17 @@
+#!/bin/sh /etc/rc.common
+
+START=99
+STOP=10
+USE_PROCD=1
+
+PROG="/usr/sbin/bfdd"
+CONF="/etc/bfdd/bfdd.json"
+
+start_service() {
+    procd_open_instance
+    procd_set_param command $PROG -c $CONF
+    procd_set_param stdout 1
+    procd_set_param stderr 1
+    procd_set_param respawn
+    procd_close_instance
+}