Add systemd unit files for malpd and support systemd socket activation

systemd/malpd.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=MALP monitoring daemon
+Requires=malpd.socket
+
+[Service]
+Type=simple
+ExecStart=/var/www/malp/bin/malpd
+
+[Install]
+WantedBy=multi-user.target