Update vendoring (#801)

* Update vendor github.com/godbus/dbus@v4.1.0

* Update vendor github.com/golang/protobuf/proto

* Update vendor github.com/mdlayher/netlink/...

* Update vendor github.com/prometheus/client_golang/prometheus/...

* Update vendor github.com/prometheus/client_model/go

* Update vendor github.com/prometheus/common/...

* Update vendor github.com/prometheus/procfs/...

* Update vendor github.com/sirupsen/logrus@v1.0.4

* Update vendor golang.org/x/...

* Update vendor gopkg.in/alecthomas/kingpin.v2

* Remove obsolete vendor github.com/mdlayher/netlink/genetlink

vendor/gopkg.in/alecthomas/kingpin.v2/README.md

@@ -222,7 +222,7 @@ Args:
   <ip>        IP address to ping.
   [<count>]   Number of packets to send
 $ ping 1.2.3.4 5
-Would ping: 1.2.3.4 with timeout 5s and count 0
+Would ping: 1.2.3.4 with timeout 5s and count 5
 ```
 
 From the following source:
@@ -461,7 +461,7 @@ Here are some examples of flags with various permutations:
 
     --name=NAME           // Flag(...).String()
     --name="Harry"        // Flag(...).Default("Harry").String()
-    --name=FULL-NAME      // flag(...).PlaceHolder("FULL-NAME").Default("Harry").String()
+    --name=FULL-NAME      // Flag(...).PlaceHolder("FULL-NAME").Default("Harry").String()
 
 ### Consuming all remaining arguments
 

vendor/gopkg.in/alecthomas/kingpin.v2/app.go

@@ -402,6 +402,9 @@ func (a *Application) setDefaults(context *ParseContext) error {
 	flagElements := map[string]*ParseElement{}
 	for _, element := range context.Elements {
 		if flag, ok := element.Clause.(*FlagClause); ok {
+			if flag.name == "help" {
+				return nil
+			}
 			flagElements[flag.name] = element
 		}
 	}

vendor/gopkg.in/alecthomas/kingpin.v2/parser.go

@@ -153,6 +153,10 @@ func (p *ParseContext) EOL() bool {
 	return p.Peek().Type == TokenEOL
 }
 
+func (p *ParseContext) Error() bool {
+	return p.Peek().Type == TokenError
+}
+
 // Next token in the parse context.
 func (p *ParseContext) Next() *Token {
 	if len(p.peek) > 0 {
@@ -266,9 +270,12 @@ func (p *ParseContext) matchedCmd(cmd *CmdClause) {
 
 // Expand arguments from a file. Lines starting with # will be treated as comments.
 func ExpandArgsFromFile(filename string) (out []string, err error) {
+	if filename == "" {
+		return nil, fmt.Errorf("expected @ file to expand arguments from")
+	}
 	r, err := os.Open(filename)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("failed to open arguments file %q: %s", filename, err)
 	}
 	defer r.Close()
 	scanner := bufio.NewScanner(r)
@@ -280,6 +287,9 @@ func ExpandArgsFromFile(filename string) (out []string, err error) {
 		out = append(out, line)
 	}
 	err = scanner.Err()
+	if err != nil {
+		return nil, fmt.Errorf("failed to read arguments from %q: %s", filename, err)
+	}
 	return
 }
 
@@ -291,7 +301,7 @@ func parse(context *ParseContext, app *Application) (err error) {
 	ignoreDefault := context.ignoreDefault
 
 loop:
-	for !context.EOL() {
+	for !context.EOL() && !context.Error() {
 		token := context.Peek()
 
 		switch token.Type {
@@ -365,6 +375,10 @@ loop:
 		}
 	}
 
+	if context.Error() {
+		return fmt.Errorf("%s", context.Peek().Value)
+	}
+
 	if !context.EOL() {
 		return fmt.Errorf("unexpected %s", context.Peek())
 	}