Add setting to not use RLRQ and RLRE

[Krolken]

It is possible for device to not use ReleaseRequest and ReleaseResonse.

Before this was handled by customizing the client, but since we now Have the DlmsConnectionSetting-object it would be better to put it there.

Example:

@attr.s(auto_attribs=True)
class DlmsConnectionSettings:
    """
    Class to hold values and settings to handle different quirks of different dlms
    server implementations and manufacturers specific irregularity.
    """
    # Indicates if the connection and the client should allow for RLRQ to be send.
    use_rlrq_rlre: bool = attr.ib(default=True)
    # In Pietro Fiorentini local communication over HDLC the system title in GeneralGlobalCiphering is omitted.
    empty_system_title_in_general_glo_ciphering: bool = attr.ib(default=False)