openvpn: bump version to 2.3.1, by MaxMuster (refs #2053)
polarssl: remove compat patch, not needed anymore


git-svn-id: file:///var/svn/freetz/trunk@10303 149334a1-2f27-0410-a3b9-fc62619ac1e6
openvpn: disable multi-homing and portsharing feature, it's not (yet) configurable via WebGUI (saves some bytes), refs #1979


git-svn-id: file:///var/svn/freetz/trunk@10304 149334a1-2f27-0410-a3b9-fc62619ac1e6