--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/curl/lib/altsvc.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,78 @@
+#ifndef HEADER_CURL_ALTSVC_H
+#define HEADER_CURL_ALTSVC_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+#include "curl_setup.h"
+
+#if !defined(CURL_DISABLE_HTTP) && defined(USE_ALTSVC)
+#include <curl/curl.h>
+#include "llist.h"
+
+enum alpnid {
+  ALPN_none = 0,
+  ALPN_h1 = CURLALTSVC_H1,
+  ALPN_h2 = CURLALTSVC_H2,
+  ALPN_h3 = CURLALTSVC_H3
+};
+
+struct althost {
+  char *host;
+  unsigned short port;
+  enum alpnid alpnid;
+};
+
+struct altsvc {
+  struct althost src;
+  struct althost dst;
+  time_t expires;
+  bool persist;
+  int prio;
+  struct curl_llist_element node;
+};
+
+struct altsvcinfo {
+  char *filename;
+  struct curl_llist list; /* list of entries */
+  size_t num; /* number of alt-svc entries */
+  long flags; /* the publicly set bitmask */
+};
+
+const char *Curl_alpnid2str(enum alpnid id);
+struct altsvcinfo *Curl_altsvc_init(void);
+CURLcode Curl_altsvc_load(struct altsvcinfo *asi, const char *file);
+CURLcode Curl_altsvc_save(struct altsvcinfo *asi, const char *file);
+CURLcode Curl_altsvc_ctrl(struct altsvcinfo *asi, const long ctrl);
+void Curl_altsvc_cleanup(struct altsvcinfo *altsvc);
+CURLcode Curl_altsvc_parse(struct Curl_easy *data,
+                           struct altsvcinfo *altsvc, const char *value,
+                           enum alpnid srcalpn, const char *srchost,
+                           unsigned short srcport);
+bool Curl_altsvc_lookup(struct altsvcinfo *asi,
+                        enum alpnid srcalpnid, const char *srchost,
+                        int srcport,
+                        struct altsvc **dstentry,
+                        int versions); /* one or more CURLALTSVC_H* bits */
+#else
+/* disabled */
+#define Curl_altsvc_save(a,b)
+#endif /* CURL_DISABLE_HTTP || USE_ALTSVC */
+#endif /* HEADER_CURL_ALTSVC_H */