CMD_INIT:
Initialise. Done automatically at Power_on, but can be user-initialised.
After that you can input number of partners (priv_fnc_cnt). All
information is zeroed and new keypair is generated and taken into use for RSA and IDEA key transfer. NB!! this should be done with caution, cause you will lose the ability to talk to partners. ( You need old key to change to new key, old key is reset with initialise command).