Update networking layer w/ CURL and emscripten impl

External/curl-8.17.0/docs/libcurl/curl_mime_free.md

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+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Title: curl_mime_free
+Section: 3
+Source: libcurl
+See-also:
+  - curl_free (3)
+  - curl_mime_init (3)
+Protocol:
+  - HTTP
+  - IMAP
+  - SMTP
+Added-in: 7.56.0
+---
+
+# NAME
+
+curl_mime_free - free a previously built mime structure
+
+# SYNOPSIS
+
+~~~c
+#include <curl/curl.h>
+
+void curl_mime_free(curl_mime *mime);
+~~~
+
+# DESCRIPTION
+
+curl_mime_free(3) is used to clean up data previously built/appended
+with curl_mime_addpart(3) and other mime-handling functions. This must
+be called when the data has been used, which typically means after
+curl_easy_perform(3) has been called.
+
+The handle to free is the one you passed to the CURLOPT_MIMEPOST(3)
+option: attached sub part mime structures must not be explicitly freed as they
+are by the top structure freeing.
+
+**mime** is the handle as returned from a previous call to
+curl_mime_init(3) and may be NULL.
+
+Passing in a NULL pointer in *mime* makes this function return immediately
+with no action.
+
+# %PROTOCOLS%
+
+# EXAMPLE
+
+~~~c
+int main(void)
+{
+  CURL *curl = curl_easy_init();
+  if(curl) {
+    /* Build the mime message. */
+    curl_mime *mime = curl_mime_init(curl);
+
+    /* send off the transfer */
+
+    /* Free multipart message. */
+    curl_mime_free(mime);
+  }
+}
+~~~
+
+# %AVAILABILITY%
+
+# RETURN VALUE
+
+None