[source] relayd: fix reload / interface restart issues

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/3f20fd4ee0a5450fcbacab56f337e5cf3dd5991f

commit 3f20fd4ee0a5450fcbacab56f337e5cf3dd5991f
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Tue Dec 27 13:19:46 2016 +0100

    relayd: fix reload / interface restart issues
    
    - replace the hotplug script with an interface trigger
    - add netdev params to procd to trigger restart
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 package/network/services/relayd/Makefile            | 2 --
 package/network/services/relayd/files/relay.hotplug | 2 --
 package/network/services/relayd/files/relay.init    | 2 ++
 3 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/package/network/services/relayd/Makefile b/package/network/services/relayd/Makefile
index 8c738fb..25c56d4 100644
--- a/package/network/services/relayd/Makefile
+++ b/package/network/services/relayd/Makefile
@@ -35,8 +35,6 @@ TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include
 define Package/relayd/install
 	$(INSTALL_DIR) $(1)/usr/sbin
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/relayd $(1)/usr/sbin/relayd
-	$(INSTALL_DIR) $(1)/etc/hotplug.d/iface
-	$(INSTALL_DATA) ./files/relay.hotplug $(1)/etc/hotplug.d/iface/30-relay
 	$(INSTALL_DIR) $(1)/etc/init.d
 	$(INSTALL_BIN) ./files/relay.init $(1)/etc/init.d/relayd
 endef
diff --git a/package/network/services/relayd/files/relay.hotplug b/package/network/services/relayd/files/relay.hotplug
deleted file mode 100644
index afffbfe..0000000
--- a/package/network/services/relayd/files/relay.hotplug
+++ /dev/null
@@ -1,2 +0,0 @@
-#!/bin/sh
-/etc/init.d/relayd enabled && /etc/init.d/relayd start
diff --git a/package/network/services/relayd/files/relay.init b/package/network/services/relayd/files/relay.init
index c628863..e5715a5 100644
--- a/package/network/services/relayd/files/relay.init
+++ b/package/network/services/relayd/files/relay.init
@@ -20,6 +20,7 @@ validate_proto_relayd()
 resolve_ifname() {
 	grep -qs "^ *$1:" /proc/net/dev && {
 		procd_append_param command -I "$1"
+		procd_append_param netdev "$1"
 		append ifaces "$1"
 	}
 }
@@ -106,6 +107,7 @@ start_relay() {
 service_triggers()
 {
 	procd_add_reload_trigger "network"
+	procd_add_raw_trigger "interface.*" 2000 /etc/init.d/relayd reload
 }
 
 start_service() {