Update to k8s v1.20

vendor/github.com/moby/term/tc.go

@@ -0,0 +1,20 @@
+// +build !windows
+
+package term // import "github.com/moby/term"
+
+import (
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+)
+
+func tcget(fd uintptr, p *Termios) syscall.Errno {
+	_, _, err := unix.Syscall(unix.SYS_IOCTL, fd, uintptr(getTermios), uintptr(unsafe.Pointer(p)))
+	return err
+}
+
+func tcset(fd uintptr, p *Termios) syscall.Errno {
+	_, _, err := unix.Syscall(unix.SYS_IOCTL, fd, setTermios, uintptr(unsafe.Pointer(p)))
+	return err
+}