vendor.conf,vendor: vndr update for containers/image

Signed-off-by: Erik Hollensbe <github@hollensbe.org>

vendor/golang.org/x/net/http2/hpack/encode.go

@@ -45,7 +45,7 @@ func NewEncoder(w io.Writer) *Encoder {
 
 // WriteField encodes f into a single Write to e's underlying Writer.
 // This function may also produce bytes for "Header Table Size Update"
-// if necessary.  If produced, it is done before encoding f.
+// if necessary. If produced, it is done before encoding f.
 func (e *Encoder) WriteField(f HeaderField) error {
 	e.buf = e.buf[:0]
 
@@ -89,21 +89,16 @@ func (e *Encoder) WriteField(f HeaderField) error {
 // becomes false.
 func (e *Encoder) searchTable(f HeaderField) (i uint64, nameValueMatch bool) {
 	for idx, hf := range staticTable {
-		if !constantTimeStringCompare(hf.Name, f.Name) {
+		if hf.Name != f.Name {
 			continue
 		}
 		if i == 0 {
 			i = uint64(idx + 1)
 		}
-		if f.Sensitive {
+		if f.Sensitive || hf.Value != f.Value {
 			continue
 		}
-		if !constantTimeStringCompare(hf.Value, f.Value) {
-			continue
-		}
-		i = uint64(idx + 1)
-		nameValueMatch = true
-		return
+		return uint64(idx + 1), true
 	}
 
 	j, nameValueMatch := e.dynTab.search(f)