It has a slightly different behaviour than the other T4X.

* key were not removed from phone when removed from config
* BLF was only working for the first 10 keys
* could not use expansion module key

It was messy and not used.

Replaced by xivo-snom-8.7.3.25.

When set to "on", it does not work well with headset.

Also, move static information from base.tpl to snom-general.xml (quite
optional, but let's do it anyway).

The big led will only light up when the device is ringing and when on a call

These settings can't be changed via the configuration file afterward.