Add _seconds suffix to node_time. (#823)

collector/time.go

@@ -35,7 +35,7 @@ func init() {
 func NewTimeCollector() (Collector, error) {
 	return &timeCollector{
 		desc: prometheus.NewDesc(
-			namespace+"_time",
+			namespace+"_time_seconds",
 			"System time in seconds since epoch (1970).",
 			nil, nil,
 		),

docs/TIME.md

@@ -41,7 +41,7 @@ implementation details vary from "**local** wall-clock time" to "Reference Time
 field in incoming SNTP packet".
 
 `time() - node_ntp_reference_timestamp_seconds` and
-`node_time - node_ntp_reference_timestamp_seconds` represent some estimate of
+`node_time_seconds - node_ntp_reference_timestamp_seconds` represent some estimate of
 "freshness" of synchronization.
 
 ### `node_ntp_root_delay` and `node_ntp_root_dispersion`