hci: send no hci commmands after hci disconnect

hci: fix bug in gap_inquiry_stop that triggered additional GAP_EVENT_INQUIRY_COMPLETE instead of stopping the inquiry

hci: reject gap_inquiry_start if stack is not working

gap: introduce GIAC and LIAC, use gap_start_inquiry wrapper function

hci: fix Classic-only compile

hci: fix compile without ENABLE_CLASSIC

hci: free hci connection struct on error reported in hci command status event

hci: extract hci_handle_connection_failed

hci: fix regression from f5e5741d1 that prevents creating connections

hci: emit transport packet sent for some missing synchronous transport cases and on errors

hci: call hci_release_packet_buffer() instead of setting it directly

hci: extract hci_emit_transport_packet_sent()

hci: return -1 if hci_create_connection was not sent to transport layer in hci_send_cmd_packet

hci: move packet buffer release for synchronous connections up into hci_send_cmd_va_arg

hci: avoid anonymous union

hci: ignore upper 4 bits for HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS

hci: use correct enum for pairing idle

hci: calculate sco_packet_length based on number of concurrent sco connections - fixes #129

hci: calculate sco_packet_length based on number of concurrent sco connections - fixes #129

gap: don't emit security level while security request is active. fixes l2cap disconnect caused by parallel SDP connection

hci: fix compile warning 'statement is unreachable'

hci: avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1

fix build without BLE

hci: fix buffer overrun in gap_inquiry_explode

gap: handle HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST