example: use GAP_SUBEVENT_LE_CONNECTION_COMPLETE instead of HCI_SUBEVENT_LE_CONNECTION_COMPLETE

example: use sm pairing events instead of hci encryption change (v2)

example: handle HCI_EVENT_ENCRYPTION_CHANGE_V2

example: remove call to le_device_db_init

license: update text

sm_pairing examples: handle ERROR_CODE_PIN_OR_KEY_MISSING

sm_pairing examples: report pairing started event

example: init gatt client for sm pairing examples, pretty print gatt result

fix warnings for log_info/printf

example/sm_pairing: improve console output

example/sm_pairing_central: delete bonding information and trigger pairing after re-encryption failure

sm pairing examples: print re-encryption events

docu: copy editing examples titles

docu: updated titles of examples

example/sm_peripheral + sm_central: improve comment, add example config for keyboard entry

sm: support LE Secure Connections Only mode with sm_set_secure_connections_only_mode

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

example: document that .h is generated from .gatt

sm_pairing_central: split packet handler into hci and sm part, handle passkey input

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

example/sm_pairing_central: print SM_EVENT_PAIRING_COMPLETE

sm_pairing_peripheral: fix gatt include

sm_pairing_central: print encryption state

sm_pairing_central: add dummy GATT DB

sm: sm_use_fixed_legacy_pairing_passkey_in_display_role -> sm_use_fixed_passkey_in_display_role