Support dynamic connection/disconnection on medulla for protocol 5

Created by: frankybonnet

asebamedulla crashes everytime when using a bluetooth link with the new protocole (5) and when using the dump (-d) option:

[Fri Nov 27 14:42:59 2015 922] Incoming connection from ser:device=/dev/rfcomm5;baud=115200;stop=1;parity=none;fc=none;bits=8;dtr=true [Fri Nov 27 14:43:00 2015 122] 0xa000 presence from 0 : protocol version 5

asebamedulla can connect only without the dump option.