If proxy fails then then signal should be sent to the main process

This way ^c will actually kill the host process if the container is not
actually running.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

Closes: #1086
Approved by: baude

cmd/podman/sigproxy.go

@@ -25,6 +25,8 @@ func ProxySignals(ctr *libpod.Container) {
 
 			if err := ctr.Kill(uint(s.(syscall.Signal))); err != nil {
 				logrus.Errorf("Error forwarding signal %d to container %s: %v", s, ctr.ID(), err)
+				signal.StopCatch(sigBuffer)
+				syscall.Kill(syscall.Getpid(), s.(syscall.Signal))
 			}
 		}
 	}()