Added systemd support

Signed-off-by: Janos SUTO <sj@acts.hu>

systemd/pilersearch.service

@@ -0,0 +1,18 @@
+[Unit]
+Description=Searchd for piler daemon
+After=network.target mariadb.service
+
+[Service]
+ExecStart=/usr/bin/searchd --config /etc/piler/sphinx.conf
+ExecStartPre=/bin/bash -c "if [[ ! -d /var/run/piler ]]; then mkdir -p /var/run/piler; chown piler:piler /var/run/piler; fi"
+PIDFile=/var/run/piler/searchd.pid
+KillMode=process
+Restart=on-failure
+RestartPreventExitStatus=255
+Type=forking
+User=piler
+
+
+[Install]
+WantedBy=multi-user.target
+Alias=pilersearch.service