example: use sdp_create_service_record_handle() for sdp record and assert sdp record buffer is large enough, fixes #489

examples: unify status stdout format

example/spp_counter: remove outdated comments

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

license: update text

example: revert accidental commit

example: use AD Flags 0x02 in dual-mode examples

examples: use `btstack_event.h` getters instead of direct array access, use enum to compare status codes

docu: copy editing examples titles

docu: updated titles of examples

Use BTSTACK_FILE__ without __ prefix (MISRAC2012-Rule-21.1)

rfcomm: assertt ENABLE_L2CAP_ENHANCED_RETRANSMISSION_MODE is defined if ENABLE_L2CAP_ENHANCED_RETRANSMISSION_MODE_FOR_RFCOMM is enabled

spp_streamer/spp_streamer_client: optionally use L2CAP ERTM for RFCOMM with a single ERTM buffer

example: register for events after setting up the stack, register for hci events after sm_init()

update examples docu

docu: add example tags, fix table for pdf

examples: unify local names and append BD_ADDR

spp_streamer: disable page/inquiry scan during test

example/spp_streamer: new version that acts as a server, similar to le_streamer

bluetooth_sdp: use scraped SDP UUID and PSMs for SDP record creation and parsing

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

fix unused parameters warning

use btstack_event_state_get_state

events: RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE -> RFCOMM_EVENT_CHANNEL_OPENED

example/spp_streamer: report premature channel close