handle L2CAP configure request while waiting for configure request response

prepend all source files with 'new BSD' copyright header

correct address of result field in CONNECTION_RESPONSE (really)

correct address of result field in CONNECTION_RESPONSE

treat L2CAP CONNECTION_RESPONSE with result = pending as error, just wait

map l2cap errors to general status code

forward channel ID to client packet handler. only deliver payload to client instead of complete header incl acl + l2cap headers. fix examples

added status to L2CAP_CHANNEL_OPENED event

clean up command names and headers

added capture mode to get all ACL packets from client app, started BTstack Man-in-the-Middle implementation

trace Bluetooth status in daemon

automatic HCI link disconnect

if client conenctions breaks, close all L2CAP channels used by client

emit l2cap disconnect events when basedband connection closes

implemented l2cap_disconnect command

improve hci connection handling -> suppress create connection requests for connections already open and just emit connection complete event

streamline event forwarding in BTdaemon stack

moved l2cap state machine to l2cap.c. added 'channel' parameter to packet header for socket communications. removed unused functions. dispatch btstack commands in daemon.c. renamed non-HCI commands

extract l2cap signaling code into l2cap_signaling

fixing bugs created while copy \& paste of code without event a single test. example connects, does paring and gets stuck in l2cap statemachine

started L2CAP implementation