Fix typo --data-cipher-fallback

Change-Id: I38e70cb74c10848ab2981efc4c4c8863c5c8785d
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Arne Schwabe <arne-openvpn@rfc2549.org>
Message-Id: <20240305082236.17566-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg28321.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit f6608b56e4)

doc/man-sections/generic-options.rst

@@ -75,7 +75,7 @@ which mode OpenVPN is configured as.
     to the configuration if no other compression options are present.
   - 2.4.x or lower: The cipher in ``--cipher`` is appended to
     ``--data-ciphers``.
-  - 2.3.x or lower: ``--data-cipher-fallback`` is automatically added with
+  - 2.3.x or lower: ``--data-ciphers-fallback`` is automatically added with
     the same cipher as ``--cipher``.
   - 2.3.6 or lower: ``--tls-version-min 1.0`` is added to the configuration
     when ``--tls-version-min`` is not explicitly set.

src/openvpn/dco.c

@@ -400,7 +400,7 @@ dco_check_option(int msglevel, const struct options *o)
     if (o->enable_ncp_fallback
         && !tls_item_in_cipher_list(o->ciphername, dco_get_supported_ciphers()))
     {
-        msg(msglevel, "Note: --data-cipher-fallback with cipher '%s' "
+        msg(msglevel, "Note: --data-ciphers-fallback with cipher '%s' "
             "disables data channel offload.", o->ciphername);
         return false;
     }