Provide and install a zoneminder.service file to get zm running with systemd on debian jessie

distros/debian8/install

@@ -20,3 +20,4 @@ etc/zm
 db/zm_create.sql usr/share/zoneminder/db
 db/zm_update-*.sql usr/share/zoneminder/db
 debian/apache.conf etc/zm
+debian/zoneminder.service lib/systemd/system

distros/debian8/zoneminder.service

@@ -0,0 +1,18 @@
+# ZoneMinder systemd unit file
+# This file is intended to work with debian distributions
+
+[Unit]
+Description=ZoneMinder CCTV recording and security system
+After=network.target mysql.service apache2.service
+Requires=mysql.service apache2.service
+
+[Service]
+User=www-data
+Type=forking
+ExecStart=/usr/bin/zmpkg.pl start
+ExecReload=/usr/bin/zmpkg.pl restart
+ExecStop=/bin/bash -c '[[ "$(/usr/bin/pgrep zmdc.pl)" > 0 ]] && /usr/bin/zmpkg.pl stop'
+PIDFile=/var/run/zm/zm.pid
+
+[Install]
+WantedBy=multi-user.target