Update libcurl

Engine/lib/curl/docs/cmdline-opts/json.d

@@ -0,0 +1,34 @@
+c: Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Long: json
+Arg: <data>
+Help: HTTP POST JSON
+Protocols: HTTP
+See-also: data-binary data-raw
+Mutexed: form head upload-file
+Category: http post upload
+Example: --json '{ "drink": "coffe" }' $URL
+Example: --json '{ "drink":' --json ' "coffe" }' $URL
+Example: --json @prepared $URL
+Example: --json @- $URL < json.txt
+Added: 7.82.0
+---
+Sends the specified JSON data in a POST request to the HTTP server. --json
+works as a shortcut for passing on these three options:
+
+ --data [arg]
+ --header "Content-Type: application/json"
+ --header "Accept: application/json"
+
+There is **no verification** that the passed in data is actual JSON or that
+the syntax is correct.
+
+If you start the data with the letter @, the rest should be a file name to
+read the data from, or a single dash (-) if you want curl to read the data
+from stdin. Posting data from a file named 'foobar' would thus be done with
+--json @foobar and to instead read the data from stdin, use --json @-.
+
+If this option is used more than once on the same command line, the additional
+data pieces will be concatenated to the previous before sending.
+
+The headers this option sets can be overridden with --header as usual.