Go mod vendor

Signed-off-by: Shengjing Zhu <zhsj@debian.org>

vendor/github.com/prometheus/common/README.md

@@ -1,16 +0,0 @@
-# Common
-[![Build Status](https://travis-ci.org/prometheus/common.svg)](https://travis-ci.org/prometheus/common)
-
-This repository contains Go libraries that are shared across Prometheus
-components and libraries.
-
-* **config**: Common configuration structures
-* **expfmt**: Decoding and encoding for the exposition format
-* **model**: Shared data structures
-* **promlog**: A logging wrapper around [go-kit/log](https://github.com/go-kit/kit/tree/master/log)
-* **route**: A routing wrapper around [httprouter](https://github.com/julienschmidt/httprouter) using `context.Context`
-* **server**: Common servers
-* **version**: Version information and metrics
-
-## Deprecated
-* **log**: A logging wrapper around [logrus](https://github.com/sirupsen/logrus)

vendor/github.com/prometheus/common/go.mod

@@ -1,22 +0,0 @@
-module github.com/prometheus/common
-
-require (
-	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
-	github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4 // indirect
-	github.com/go-kit/kit v0.9.0
-	github.com/go-logfmt/logfmt v0.4.0 // indirect
-	github.com/golang/protobuf v1.3.2
-	github.com/julienschmidt/httprouter v1.2.0
-	github.com/matttproud/golang_protobuf_extensions v1.0.1
-	github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223
-	github.com/pkg/errors v0.8.1
-	github.com/prometheus/client_golang v1.0.0
-	github.com/prometheus/client_model v0.2.0
-	github.com/sirupsen/logrus v1.4.2
-	golang.org/x/net v0.0.0-20190613194153-d28f0bde5980 // indirect
-	golang.org/x/sys v0.0.0-20190422165155-953cdadca894
-	gopkg.in/alecthomas/kingpin.v2 v2.2.6
-	gopkg.in/yaml.v2 v2.2.4
-)
-
-go 1.11

vendor/github.com/prometheus/common/model/time.go

@@ -186,6 +186,10 @@ var durationRE = regexp.MustCompile("^([0-9]+)(y|w|d|h|m|s|ms)$")
 // ParseDuration parses a string into a time.Duration, assuming that a year
 // always has 365d, a week always has 7d, and a day always has 24h.
 func ParseDuration(durationStr string) (Duration, error) {
+	// Allow 0 without a unit.
+	if durationStr == "0" {
+		return 0, nil
+	}
 	matches := durationRE.FindStringSubmatch(durationStr)
 	if len(matches) != 3 {
 		return 0, fmt.Errorf("not a valid duration string: %q", durationStr)