Support floats in statsd percentiles (#5572)

internal/internal.go

@@ -48,6 +48,10 @@ type Size struct {
 	Size int64
 }
 
+type Number struct {
+	Value float64
+}
+
 // SetVersion sets the telegraf agent version
 func SetVersion(v string) error {
 	if version != "" {
@@ -124,6 +128,16 @@ func (s *Size) UnmarshalTOML(b []byte) error {
 	return nil
 }
 
+func (n *Number) UnmarshalTOML(b []byte) error {
+	value, err := strconv.ParseFloat(string(b), 64)
+	if err != nil {
+		return err
+	}
+
+	n.Value = value
+	return nil
+}
+
 // ReadLines reads contents from a file and splits them by new lines.
 // A convenience wrapper to ReadLinesOffsetN(filename, 0, -1).
 func ReadLines(filename string) ([]string, error) {