Log Message:
Changes 3.6 - 3.19
        Add L2CAP mode constants.
        Don't allocate memory for the Bluetooth base UUID.
        Fix supported commands bit calculation.
        Update company identifier list.
        Extract main service class for later use.
        Add definitions and functions for Simple Pairing.
        Update HCI command table.
        Add missing HCI command text descriptions
        Add missing HCI commands structures.
        Add missing HCI event structures.
        Add common bachk() function.
        Fix URL data size handling.
        Add version code for Bluetooth 2.1 specification.
        Add ESCO_LINK connection type constant.
        Export sdp_uuid32_to_uuid128() function.
        Update copyright information.
        Add functions for registering binary records.
        Add additional PDU length checks.
        Fix CSRC value for partial responses.
        Fix issues with the asynchronous API for SDP.