panu_demo: connect to BNEP after SDP query is complete

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

example: fix warning for unused argc, argv

example/panu_demo: fix compile, use gap pairing functions

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

bnep: use UUIDs from bluetooth_sdp.h

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

example/panu_demo: fix unused argument warnings

use getters in BNEP_EVENT_CHANNEL_OPENED

use hci_event_pin_code_request_get_bd_addr

Merge branch 'develop' of https://github.com/bluekitchen/btstack into develop

bnep: allow to specify packet handler per outgoing channel/service

use btstack_event_state_get_state

bnep: add bnep_cid to all events, generate bnep event getters, BNEP_EVENT_OPEN_CHANNEL_COMPLETE -> BNEP_EVENT_CHANNEL_OPENED

bnep: BNEP_EVENT_CAN_SEND_NOW instead of BNEP_EVENT_READY_TO_SEND

runloop: use new setters in panu_demo

runloop: replace struct btstack_data_source with btstack_data_source_t

event: introduce hci_event_packet_get_type

examples: move out of embedded subfolder