vendor containers/image v1.4

This requires some additional changes to the dependencies since the
progress-bar library has been changed to github.com/vbauerster/mpb.

Please refer to the following link for the release notes:
https://github.com/containers/image/releases/tag/v1.4

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

vendor/github.com/vbauerster/mpb/progress_posix.go

@@ -0,0 +1,70 @@
+// +build !windows
+
+package mpb
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+)
+
+func (p *Progress) serve(s *pState) {
+
+	var ticker *time.Ticker
+	var refreshCh <-chan time.Time
+	var winch chan os.Signal
+	var resumeTimer *time.Timer
+	var resumeEvent <-chan time.Time
+	winchIdleDur := s.rr * 2
+
+	if s.manualRefreshCh == nil {
+		ticker = time.NewTicker(s.rr)
+		refreshCh = ticker.C
+		winch = make(chan os.Signal, 2)
+		signal.Notify(winch, syscall.SIGWINCH)
+	} else {
+		refreshCh = s.manualRefreshCh
+	}
+
+	for {
+		select {
+		case op := <-p.operateState:
+			op(s)
+		case <-refreshCh:
+			if s.zeroWait {
+				if s.manualRefreshCh == nil {
+					signal.Stop(winch)
+					ticker.Stop()
+				}
+				if s.shutdownNotifier != nil {
+					close(s.shutdownNotifier)
+				}
+				close(p.done)
+				return
+			}
+			tw, err := s.cw.GetWidth()
+			if err != nil {
+				tw = s.width
+			}
+			s.render(tw)
+		case <-winch:
+			tw, err := s.cw.GetWidth()
+			if err != nil {
+				tw = s.width
+			}
+			s.render(tw - tw/8)
+			if resumeTimer != nil && resumeTimer.Reset(winchIdleDur) {
+				break
+			}
+			ticker.Stop()
+			resumeTimer = time.NewTimer(winchIdleDur)
+			resumeEvent = resumeTimer.C
+		case <-resumeEvent:
+			ticker = time.NewTicker(s.rr)
+			refreshCh = ticker.C
+			resumeEvent = nil
+			resumeTimer = nil
+		}
+	}
+}