vendor: golang.org/x/net v0.22.0, golang.org/x/crypto v0.21.0

full diffs changes relevant to vendored code:

- https://github.com/golang/net/compare/v0.20.0...v0.22.0
    - http2: remove suspicious uint32->v conversion in frame code
    - http2: send an error of FLOW_CONTROL_ERROR when exceed the maximum octets
- https://github.com/golang/crypto/compare/v0.18.0...v0.21.0
    - x/crypto/internal/poly1305: improve sum_ppc64le.s

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/golang.org/x/net/http2/frame.go

@@ -1510,13 +1510,12 @@ func (mh *MetaHeadersFrame) checkPseudos() error {
 }
 
 func (fr *Framer) maxHeaderStringLen() int {
-	v := fr.maxHeaderListSize()
-	if uint32(int(v)) == v {
-		return int(v)
+	v := int(fr.maxHeaderListSize())
+	if v < 0 {
+		// If maxHeaderListSize overflows an int, use no limit (0).
+		return 0
 	}
-	// They had a crazy big number for MaxHeaderBytes anyway,
-	// so give them unlimited header lengths:
-	return 0
+	return v
 }
 
 // readMetaFrame returns 0 or more CONTINUATION frames from fr and