license: update text

src: add title to header files

sdp: support de-init

sdp_client: add sdp_client_register_query_callback() allows to register query request instead of polling sdp_client_ready()

sdp_client: add sdp_client_register_query_callback() allows to register query request instead of polling sdp_client_ready()

Use FILENAME_H as include guard (MISRAC2012-Rule-21.1)

sdp client: add const to def

sdp_client: return error instead or copmlete event with error code

sdp_query_util: inline into sdp_util and sdp_client

sdp_query: pass in packet handler on query instead of global registration. integrate sdp_parser into sdp_client

btstack-config.h -> btstack_config.h

structure btstack-config.h

sdp_qeuery_rfcomm: delete sdp_query_rfcomm_deregister_callback

fix missing bstack_ for struct data_source and struct timer. utils->btstack_util

split sources into core, ble, and classic