Fix 'binary or' vs 'boolean or' related to server_bridge_proxy_dhcp

Fix 'binary or' vs 'boolean or' related to server_bridge_proxy_dhcp

Both values are boolean so there is no reason to use "|"
and it just confuses the reader whether there is something
more going on here.

Change-Id: Ie61fa6a78875ecbaa9d3d8e7a50603d77c9ce09e
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20240502095322.9433-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg28601.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>