Fix haproxy plugin to include missing slim metric

CHANGELOG.md

@@ -13,6 +13,7 @@
 - [#1348](https://github.com/influxdata/telegraf/issues/1348): Telegraf "internal" plugin for collecting stats on itself.
 - [#2127](https://github.com/influxdata/telegraf/pull/2127): Update Go version to 1.7.4.
 - [#2126](https://github.com/influxdata/telegraf/pull/2126): Support a metric.Split function.
+- [#2132](https://github.com/influxdata/telegraf/issues/2132): Add missing slim metric to haproxy plugin
 
 ### Bugfixes
 

plugins/inputs/haproxy/haproxy.go

@@ -258,6 +258,11 @@ func importCsvResult(r io.Reader, acc telegraf.Accumulator, host string) error {
 				if err == nil {
 					fields["scur"] = ival
 				}
+			case HF_SLIM:
+				ival, err := strconv.ParseUint(v, 10, 64)
+				if err == nil {
+					fields["slim"] = ival
+				}
 			case HF_SMAX:
 				ival, err := strconv.ParseUint(v, 10, 64)
 				if err == nil {