nlbwmon: add hotplug script to reload after interface ifup

Add a hotplug script to reload nlbwmon's config after interface
ifup actions.

That should improve the detection of the IPv6 LAN address
that can get enabled a bit later in the boot process.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

net/nlbwmon/Makefile

@@ -1,7 +1,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=nlbwmon
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://github.com/jow-/nlbwmon.git
@@ -25,7 +25,7 @@ define Package/nlbwmon
   SECTION:=net
   CATEGORY:=Network
   DEPENDS:=+libubox +libnl-tiny +zlib +kmod-nf-conntrack-netlink
-  TITLE:=LEDE Traffic Usage Monitor
+  TITLE:=OpenWrt Traffic Usage Monitor
 endef
 
 define Package/nlbwmon/install
@@ -38,6 +38,8 @@ define Package/nlbwmon/install
 	$(INSTALL_BIN) ./files/nlbwmon.init $(1)/etc/init.d/nlbwmon
 	$(INSTALL_DIR) $(1)/etc/config
 	$(INSTALL_CONF) ./files/nlbwmon.config $(1)/etc/config/nlbwmon
+	$(INSTALL_DIR) $(1)/etc/hotplug.d/iface
+	$(INSTALL_BIN) ./files/nlbwmon.hotplug $(1)/etc/hotplug.d/iface/30-nlbwmon
 endef
 
 define Package/nlbwmon/conffiles

net/nlbwmon/files/nlbwmon.hotplug

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+[ -n "$DEVICE" ] || exit 0
+
+[ "$ACTION" = ifup ] && /etc/init.d/nlbwmon enabled && {
+	/etc/init.d/nlbwmon reload
+	logger -t nlbwmon "Reloading nlbwmon due to $ACTION of $INTERFACE ($DEVICE)"
+}
+