portaudio: split audio interface

libusb: add btstack_audio

libusb: fix packet log path derivation from usb path if additional arguments are provided

libusb: setup btstack_tlv_posix using bd_addr in path

btstack_stdin: replace stdin_support.[ch] with btstack_stdin.h and platform implementations

tool: add update_filename.py that adds __BTSTACK_FILE__ to every .c file for use with debug output instead of __FILE__

libusb: remove parsed -u argument from command line arguments before passing it to btstack_main()

posix-like ports: unify sigint handler

fix unused parameters warning

hci: disable parts of classic code if ENABLE_CLASSIC is not defined

libusb: add USB path to packet log file name

libusb: parse -u 11-22-33 as USB path, too

libusb: parse -u 11:22:33 as USB path

move 'BTstack up and running' message from examples into port/../main.c

hci: set link_key_db via hci_set_link_key_db instead of via hci_init().

split remote_device_db into btstack_link_key_db and btstack_device_name_db

Merge branch 'master' into ble-api-cleanup

hci_transport: cleanup struct, add init(void *transport_config)

remove btstack_control_h from hci_init. mark btstack_control, hci_transport, and hci_transport_config as const

chipset: remove all chipset functions from btstack_control.h and use from hci.c

btstack-config.h -> btstack_config.h

prefix run_loop_ functions with btstack_

run_loop_X.c/h -> run_loop_X.c/h

run_loop.h -> btstack_run_loop.h

prefix debug with btstack_