Update init.d script to allow custom service name

nginx/source.sls

@@ -222,6 +222,7 @@ nginx:
     - group: root
     - mode: 0755
     - context:
+      service_name: {{ service_name }}
       sbin_dir: {{ sbin_dir }}
       pid_path: {{ pid_path }}
   service:

nginx/templates/nginx.init.jinja

@@ -1,23 +1,23 @@
 #!/bin/sh
 
 ### BEGIN INIT INFO
-# Provides:          nginx
+# Provides:          {{ service_name }}
 # Required-Start:    $local_fs $remote_fs $network $syslog
 # Required-Stop:     $local_fs $remote_fs $network $syslog
 # Default-Start:     2 3 4 5
 # Default-Stop:      0 1 6
-# Short-Description: starts the nginx web server
-# Description:       starts nginx using start-stop-daemon
+# Short-Description: starts the {{ service_name }} web server
+# Description:       starts {{ service_name }} using start-stop-daemon
 ### END INIT INFO
 
 PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
 DAEMON={{ sbin_dir }}/nginx
-NAME=nginx
-DESC=nginx
+NAME={{ service_name }}
+DESC={{ service_name }}
 
 # Include nginx defaults if available
-if [ -f /etc/default/nginx ]; then
-	. /etc/default/nginx
+if [ -f /etc/default/$NAME ]; then
+	. /etc/default/$NAME
 fi
 
 test -x $DAEMON || exit 0