Update networking layer w/ CURL and emscripten impl

External/curl-8.17.0/docs/libcurl/opts/CURLOPT_HSTSWRITEDATA.md

@@ -0,0 +1,71 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_HSTSWRITEDATA
+Section: 3
+Source: libcurl
+Protocol:
+  - HTTP
+See-also:
+  - CURLOPT_HSTS (3)
+  - CURLOPT_HSTSREADDATA (3)
+  - CURLOPT_HSTSREADFUNCTION (3)
+  - CURLOPT_HSTSWRITEFUNCTION (3)
+Added-in: 7.74.0
+---
+
+# NAME
+
+CURLOPT_HSTSWRITEDATA - pointer passed to the HSTS write callback
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HSTSWRITEDATA, void *pointer);
+~~~
+
+# DESCRIPTION
+
+Data *pointer* to pass to the HSTS write function. If you use the
+CURLOPT_HSTSWRITEFUNCTION(3) option, this is the pointer you get as
+input in the fourth argument to the callback.
+
+This option does not enable HSTS, you need to use CURLOPT_HSTS_CTRL(3) to
+do that.
+
+# DEFAULT
+
+NULL
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+struct MyData {
+  void *custom;
+};
+
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  struct MyData this;
+  if(curl) {
+    curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
+
+    /* pass pointer that gets passed in to the
+       CURLOPT_HSTSWRITEFUNCTION callback */
+    curl_easy_setopt(curl, CURLOPT_HSTSWRITEDATA, &this);
+
+    curl_easy_perform(curl);
+  }
+}
+~~~
+
+# %AVAILABILITY%
+
+# RETURN VALUE
+
+This returns CURLE_OK.