exmple/mesh_node_demo: use
instead of strcat

example/sdp_rfcomm_query: use btstack_strcpy

Merge branch 'develop'

# Conflicts:
# port/windows-winusb-intel/main.c
# port/windows-winusb/main.c
# src/ble/sm.c
# src/hci.c
# src/hci.h
# src/l2cap.c

example/audio_duplex: avoid noise on start

example/audio_duplex: improve for stereo input

example/pbap_client_demo: improve user interface

avrcp_browsing, goep_client: request 16-bit FCS for ERTM

example: init SM if LE supported to avoid issue with Android Cross-Transport Key-Derivation

example: remove call to le_device_db_init

example/hsp: update examples

example: add obex_parser.c to examples

example: le cbm clien/server - fix build

l2cap: unify events for can send now, packet sent, channel closed (CbM/ECBM using existing events)

l2cap: fold cbm/ecbm send data into l2cap_send

example: rename le_data_channel examples into le_credit_based_flow_control_mode

l2cap: use CBM and ECBM prefix in l2cap event

l2cap: streamline ertm, cbm, ecbm function names

example: fix le_data_channel_server

example: fix build

license: update text

example/a2dp_sink_demo: fix compile

avrcp_target: set events and companies

avrcp_target: send supported events and companies directly on AVRCP_PDU_ID_GET_CAPABILITIES query, remove callback from the app

avrcp_controller: rename event

avrcp_controller: emit AVRCP_SUBEVENT_ENABLE_NOTIFICATION_COMPLETE