[source] procd: add support for service signals

[LEDE Commits]

jow pushed a commit to source.git, branch master:
https://git.lede-project.org/b22a20af450b19fb47235e684afcddb301221def

commit b22a20af450b19fb47235e684afcddb301221def
Author: Jo-Philipp Wich <jo at mein.io>
AuthorDate: Tue Dec 13 18:02:56 2016 +0100

    procd: add support for service signals
    
    Update procd to latest HEAD in order to introduce support for services signals:
    
    - Adds a new service.signal ubus call to send a kill() signal to one or all
      running instances of a given service
    
    - Adds a new "reload_signal" property which allows service init scripts to
      request procd to send a specific kill() signal on reload, instead of
      stopping and restarting running processes
    
    Also fixes some potential memory leaks reported by cppcheck and an environment
    variable corruption in the trace command.
    
    Signed-off-by: Jo-Philipp Wich <jo at mein.io>
---
 package/system/procd/Makefile       | 6 +++---
 package/system/procd/files/procd.sh | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/package/system/procd/Makefile b/package/system/procd/Makefile
index 8f3d578..35305f8 100644
--- a/package/system/procd/Makefile
+++ b/package/system/procd/Makefile
@@ -8,16 +8,16 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=procd
-PKG_VERSION:=2016-12-02
+PKG_VERSION:=2016-12-13
 
 PKG_RELEASE=$(PKG_SOURCE_VERSION)
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(LEDE_GIT)/project/procd.git
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
-PKG_SOURCE_VERSION:=a07669704798cb0262485f69c5547033c64ade58
+PKG_SOURCE_VERSION:=f800ecf860addd4fc7f1acde76a9adbd4b1f50e7
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)-$(PKG_SOURCE_VERSION).tar.xz
-PKG_MIRROR_MD5SUM:=d6a6760133a8ceb78d717a851f426266a35e3957381876d91824e9877fa8c096
+PKG_MIRROR_MD5SUM:=0e47fd3bf141e8f12866d9ec79cb42c971b3f6691eb87ce1ef71dc7473ab5ee4
 CMAKE_INSTALL:=1
 
 PKG_LICENSE:=GPL-2.0
diff --git a/package/system/procd/files/procd.sh b/package/system/procd/files/procd.sh
index 290c90e..d2c5b42 100644
--- a/package/system/procd/files/procd.sh
+++ b/package/system/procd/files/procd.sh
@@ -210,7 +210,7 @@ _procd_set_param() {
 			json_add_string "" "$@"
 			json_close_array
 		;;
-		nice)
+		nice|reload_signal)
 			json_add_int "$type" "$1"
 		;;
 		pidfile|user|seccomp|capabilities)