bind: save out served domains on service stop

If named gets stopped, then started again, but isc-dhcpd isn't also
restarted, then we want named to at least have the existing content.

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>

net/bind/Makefile

@@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=bind
 PKG_VERSION:=9.20.15
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 USERID:=bind=57:bind=57
 
 PKG_MAINTAINER:=Noah Meyerhans <frodo@morgul.net>

net/bind/files/named.init

@@ -20,6 +20,10 @@ reload_service() {
 	rndc -q reload
 }
 
+stop_service() {
+	rndc stop
+}
+
 start_service() {
 	user_exists bind 57 || user_add bind 57
 	group_exists bind 57 || group_add bind 57