Improve description of compat-mode

Improve description of compat-mode

Explicitly say that the version specified is the one of the peer and not
the version we try to emulate.

Patch v2: Improve grammar.
Change-Id: I3bd27a8d34d8cb4896a3b78508b7d16911571543

Change-Id: If4fb45b3426f5e0dbe6c87d5bd05681b9d733827
Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Frank Lichtenheld <frank@lichtenheld.com>
Message-Id: <20230320165538.902965-1-arne@rfc2549.org>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg26445.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit daf66f4013d8facc085ea6cfaaf8a42f4d45a461)