options: Always define options->management_flags

options: Always define options->management_flags

That makes it possible to remove several preprocessor
directives which is a good thing. The cost should be
negligible.

Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <20221127142506.41986-1-frank@lichtenheld.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg25554.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit ff7d7989e007a8c66fba438a257c1b85e8bcca69)