Update go-restful dependency

vendor/github.com/emicklei/go-restful/log/log.go

@@ -5,7 +5,7 @@ import (
 	"os"
 )
 
-// Logger corresponds to a minimal subset of the interface satisfied by stdlib log.Logger
+// StdLogger corresponds to a minimal subset of the interface satisfied by stdlib log.Logger
 type StdLogger interface {
 	Print(v ...interface{})
 	Printf(format string, v ...interface{})
@@ -18,14 +18,17 @@ func init() {
 	SetLogger(stdlog.New(os.Stderr, "[restful] ", stdlog.LstdFlags|stdlog.Lshortfile))
 }
 
+// SetLogger sets the logger for this package
 func SetLogger(customLogger StdLogger) {
 	Logger = customLogger
 }
 
+// Print delegates to the Logger
 func Print(v ...interface{}) {
 	Logger.Print(v...)
 }
 
+// Printf delegates to the Logger
 func Printf(format string, v ...interface{}) {
 	Logger.Printf(format, v...)
 }