Update clamd.conf

Update to CentOS 7 comand!

install/rhel/7/monit/clamd.conf

@@ -1,3 +1,3 @@
 check process clamd with pidfile /var/run/clamav/clamd.pid
-    start program = "/etc/init.d/clamd start"
-    stop program  = "/etc/init.d/clamd stop"
+    start program = "/usr/bin/systemctl start clamd"
+    stop program  = "/usr/bin/systemctl stop clamd"