deps: update nghttp2 to 1.68.1

Author: nodejs-github-bot

deps/nghttp2/lib/includes/nghttp2/nghttp2ver.h

@@ -29,14 +29,14 @@
  * @macro
  * Version number of the nghttp2 library release
  */
-#define NGHTTP2_VERSION "1.68.0"
+#define NGHTTP2_VERSION "1.68.1"
 
 /**
  * @macro
  * Numerical representation of the version number of the nghttp2 library
  * release. This is a 24 bit number with 8 bits for major number, 8 bits
  * for minor and 8 bits for patch. Version 1.2.3 becomes 0x010203.
  */
-#define NGHTTP2_VERSION_NUM 0x014400
+#define NGHTTP2_VERSION_NUM 0x014401
 
 #endif /* NGHTTP2VER_H */

deps/nghttp2/lib/nghttp2_frame.c

@@ -750,6 +750,16 @@ void nghttp2_frame_unpack_altsvc_payload(nghttp2_extension *frame,
   uint8_t *p;
 
   altsvc = frame->payload;
+
+  if (payloadlen == 0) {
+    altsvc->origin = NULL;
+    altsvc->origin_len = 0;
+    altsvc->field_value = NULL;
+    altsvc->field_value_len = 0;
+
+    return;
+  }
+
   p = payload;
 
   altsvc->origin = p;

deps/nghttp2/lib/nghttp2_int.h

@@ -52,7 +52,11 @@ typedef enum {
    * Unlike NGHTTP2_ERR_IGN_HTTP_HEADER, this does not invoke
    * nghttp2_on_invalid_header_callback.
    */
-  NGHTTP2_ERR_REMOVE_HTTP_HEADER = -106
+  NGHTTP2_ERR_REMOVE_HTTP_HEADER = -106,
+  /*
+   * Cancel pushed stream.
+   */
+  NGHTTP2_ERR_PUSH_CANCEL = -107,
 } nghttp2_internal_error;
 
 #endif /* !defined(NGHTTP2_INT_H) */