Update telegraf config to parse /proc/net/softnet_stat details

Hi Chris,

Can you please pick a node to test this new config on and tell me how it goes?

roles/telegraf/files/telegraf_softnet_stats.awk

+#! /usr/bin/awk -f
+
+{ printf("softnet,cpu=%d sd_processed=%di,sd_dropped=%di,sd_time_squeeze=%di\n", NR-1, strtonum("0x"$1), strtonum("0x"$2), strtonum("0x"$3)) }
\ No newline at end of file