Update networking layer w/ CURL and emscripten impl

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

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+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: CURLOPT_HSTS
+Section: 3
+Source: libcurl
+Protocol:
+  - HTTP
+See-also:
+  - CURLOPT_ALTSVC (3)
+  - CURLOPT_HSTS_CTRL (3)
+  - CURLOPT_RESOLVE (3)
+Added-in: 7.74.0
+---
+
+# NAME
+
+CURLOPT_HSTS - HSTS cache filename
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HSTS, char *filename);
+~~~
+
+# DESCRIPTION
+
+Make the *filename* point to a filename to load an existing HSTS cache
+from, and to store the cache in when the easy handle is closed. Setting a file
+name with this option also enables HSTS for this handle (the equivalent of
+setting *CURLHSTS_ENABLE* with CURLOPT_HSTS_CTRL(3)).
+
+If the given file does not exist or contains no HSTS entries at startup, the
+HSTS cache simply starts empty. Setting the filename to NULL allows HSTS
+without reading from or writing to any file. NULL also makes libcurl clear the
+list of files to read HSTS data from, if any such were previously set.
+
+If this option is set multiple times, libcurl loads cache entries from each
+given file but only stores the last used name for later writing.
+
+# FILE FORMAT
+
+The HSTS cache is saved to and loaded from a text file with one entry per
+physical line. Each line in the file has the following format:
+
+    [host] [stamp]
+
+[host] is the domain name for the entry and the name is dot-prefixed if it is
+an entry valid for all subdomains to the name as well or only for the exact
+name.
+
+[stamp] is the time (in UTC) when the entry expires and it uses the format
+"YYYYMMDD HH:MM:SS".
+
+Lines starting with "#" are treated as comments and are ignored. There is
+currently no length or size limit.
+
+# DEFAULT
+
+NULL, no filename
+
+# SECURITY CONCERNS
+
+libcurl cannot fully protect against attacks where an attacker has write
+access to the same directory where it is directed to save files. This is
+particularly sensitive if you save files using elevated privileges.
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    curl_easy_setopt(curl, CURLOPT_HSTS, "/home/user/.hsts-cache");
+    curl_easy_perform(curl);
+  }
+}
+~~~
+
+# %AVAILABILITY%
+
+# RETURN VALUE
+
+curl_easy_setopt(3) returns a CURLcode indicating success or error.
+
+CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
+libcurl-errors(3).