isc-dhcp: update to 4.3.3. Migrate from oldplackages

Signed-off-by: Antony Antony <antony@phenome.org>

net/isc-dhcp/files/dhcrelay6.init

@@ -0,0 +1,42 @@
+#!/bin/sh /etc/rc.common
+# Copyright (C) 2012 OpenWrt.org
+
+START=91
+
+SERVICE_SIG="KILL"
+SERVICE_PID_FILE="/var/run/dhcrelay6.pid"
+SERVICE_USE_PID=1
+
+start() {
+    local relay_dhcpserver
+    local relay_upper
+    local relay_lowers
+    local relay_lower_args
+
+    config_load dhcrelay
+    config_get relay_dhcpserver ipv6 dhcpserver
+    config_get relay_upper ipv6 upper
+    config_get relay_lowers ipv6 lower
+
+    # If a specific DHCP server is specified,
+    # add it to the upper interface.
+    if [ -n "$relay_dhcpserver" ]; then
+        relay_upper="${relay_dhcpserver}%$relay_upper"
+    fi
+
+    # Add all lower interfaces at the end.
+    if [ -n "$relay_lowers" ]; then
+        local relay_lower
+        for relay_lower in $relay_lowers; do
+            append relay_lower_args "-l $relay_lower"
+        done
+    fi
+
+    service_start /usr/sbin/dhcrelay -6 -q \
+        -pf $SERVICE_PID_FILE \
+        -u $relay_upper $relay_lower_args
+}
+
+stop() {
+    service_stop /usr/sbin/dhcrelay
+}