Fix systemd unit description.

startup/default-service.in

@@ -1,5 +1,5 @@
 [Unit]
-Description=Nagios Remote Program Executor
+Description=Nagios Remote Plugin Executor
 Documentation=http://www.nagios.org/documentation
 After=var-run.mount nss-lookup.target network.target local-fs.target time-sync.target
 Before=getty@tty1.service plymouth-quit.service xdm.service

startup/default-socket-svc.in

@@ -1,5 +1,5 @@
 [Unit]
-Description=Nagios Remote Program Executor
+Description=Nagios Remote Plugin Executor
 Documentation=http://www.nagios.org/documentation
 After=var-run.mount nss-lookup.target network.target local-fs.target time-sync.target
 

startup/default-socket.in

@@ -1,5 +1,5 @@
 [Unit]
-Description=Nagios Remote Program Executor
+Description=Nagios Remote Plugin Executor
 Documentation=http://www.nagios.org/documentation
 Before=nrpe.service
 Conflicts=nrpe.service