app-backup/burp: prevent OpenRC init stript from writing the PID file

Burp manages its PID file by itself and refuses to start if it already exists,
therefore start-stop-daemon shouldn't write one.

Gentoo-Bug: 620654

Package-Manager: Portage-2.3.5, Repoman-2.3.1

app-backup/burp/files/burp2.initd

@@ -1,5 +1,5 @@
 #!/sbin/openrc-run
-# Copyright 1999-2016 Gentoo Foundation
+# Copyright 1999-2017 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
 BURP_CONFIG="/etc/burp/burp-server.conf"
@@ -10,7 +10,7 @@ command="/usr/sbin/burp"
 command_args="-c '${BURP_CONFIG}' -F"
 command_background="yes"
 pidfile="/run/burp/burp.server.pid"
-start_stop_daemon_arg="--make-pidfile --wait 500"
+start_stop_daemon_arg="--wait 500"
 
 extra_started_commands="reload summary"
 description_reload="Reloads configuration"