HTTPS Mutual Authentication

Before V3R0 the phone did only support mutual authentication for 2 interfaces:
 * With the Radius server for 802.1x.
 * With the DLS for DLS-WPI.

In V3R0 there is support for mutual authentication by the phone of the HTTPS interface to a file server (for file downloads, including new software binds). In order to support mutual authentication for HTTPS the phone will need a new client certificate chain to be download by the DLS using the DLS-WPI. Reason: For a file download the phone has to be authenticated with the client certificate at the https server.