[httpprocwatchd.service] Shorten Description. Fixed extension of config file.

contrib/systemd/httpprocwatchd.service

@@ -1,12 +1,12 @@
 [Unit]
-Description=HTTPProcWatchD hands out an HTTP endpoint to see status of watched processes.
+Description=HTTPProcWatchD
 After=network.target
 
 [Service]
 Type=simple
 DynamicUser=yes
 Restart=on-failure
-ExecStart=/usr/bin/httpprocwatchd --config /etc/httpprocwatchd/config.json
+ExecStart=/usr/bin/httpprocwatchd --config /etc/httpprocwatchd/config.conf
 ExecReload=kill -HUP $MAINPID
 
 [Install]