Can be removed when 10.4 goes out of support.

--- plugins/node.d/ping_.in.orig	2018-03-28 19:36:43 UTC
+++ plugins/node.d/ping_.in
@@ -91,5 +91,5 @@ fi
 
 
 # shellcheck disable=SC2086
-"${ping:-$PING}" ${ping_args:-'-c 2'} "${host}" ${ping_args2:-} \
+"${ping:-$PING}" ${ping_args:-'-c 2'} "${host}" ${ping_args2:- } \
 	| perl -n -e 'print "ping.value ", $1 / 1000, "\n" if m@min/avg/max.*\s\d+(?:\.\d+)?/(\d+(?:\.\d+)?)/\d+(?:\.\d+)?@; print "packetloss.value $1\n" if /(\d+)% packet loss/;'