un-nest curl

curl-8.15.0/docs/cmdline-opts/curves.md

@@ -0,0 +1,28 @@
+---
+c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+SPDX-License-Identifier: curl
+Long: curves
+Arg: <list>
+Help: (EC) TLS key exchange algorithms to request
+Protocols: TLS
+Added: 7.73.0
+Category: tls
+Multi: single
+See-also:
+  - ciphers
+Example:
+  - --curves X25519 $URL
+---
+
+# `--curves`
+
+Set specific curves to use during SSL session establishment according to RFC
+8422, 5.1. Multiple algorithms can be provided by separating them with `:`
+(e.g. `X25519:P-521`). The parameter is available identically in the OpenSSL
+`s_client` and `s_server` utilities.
+
+--curves allows a OpenSSL powered curl to make SSL-connections with exactly
+the (EC) curve requested by the client, avoiding nontransparent client/server
+negotiations.
+
+If this option is set, the default curves list built into OpenSSL are ignored.