sm: provide gap_get_persistent_irk

gap: make bd_addr_t const where possible

gap: provide LE Whitelist API via gap_whitelist_add/remove/clear

gap: add gap_connect_with_whitelist, re-implement gap_auto_connect_* functions

gap: new gap_set_scan_params allows to specify scanning filter policy

gap: request role change for classic connection via `gap_request_role`

gap: provide gap_get_role to query master/slave role for HCI connection handle

gap: add gap_pin_code_response_binary, fixes issue #307 / pull request #238

gap: comment on link key db only working after power up

gap: add gap_secure_connections_enable

GAP: gap_set_security_level sets required security level for incoming and outgoing connections

hci: introduce EXTENDED_INQUIRY_RESPONSE_DATA_LEN

hci: gap_set_allow_role_switch allows to prevent role switch in outgoing classic ACL connections

gap: only set link supervision timeout if we're master

gap: add gap_set_link_supervision_timeout and link_supervision_timeout in hci_stack.h [a2348]

gap: support reading RSSI for Classic+LE using gap_read_rssi. Emits GAP_EVENT_RSSI_MEASUREMENT

gap: Register filter for rejecting classic connections

errata-11838: validate encryption key size to emit GAP Security Level, gap_set_required_encryption_key_size allows to set the required key size

hci: support classic connection in gap_secure_connection

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

gap: add gap_secure_connection to check if encryption key results from LE Secure Connection Pairing

gap: add gap_le_set_phy command

hci/gap: save the le connection interval on connection complete and connection update

hci/gap: support snif mode

gap: add gap_set_default_link_policy_settings