I now have the version installed from experimental, but the new protocol isn't in the drop down list.
dpkg -l|grep network-manager-openconnect ii network-manager-openconnect 1.2.4- 3 amd64 network management framework (OpenConnect plugin core) ii network-manager-openconnect-gnome 1.2.4- 3 amd64 network management framework (OpenConnect plugin GNOME GUI) It only lists Cisco Anyconnect and Juniper/Pulse Network Connect.