Version 1.4.3 - Maintenance release

    cwio accu_sleep
      * replace milliSleep with new accu_sleep function
      * change activated state of configuration items based on
        port selection
      * change loop timing to use global accu_sleep

    A2B freq only
      * add shift-click to A->B button to transfer only
        frequency from vfoA to vfoB
      * add control-click to A->B button to transfer only
        frequency for vfoB to vfoA

    vfo adjust
      * change increment to fractional values

    start/exit set clock
      * add user configurable commands on program
        . start - immediately after normal start up
        . exit - immediately after normal exit
      * add time sychronization if supported by xcvr
        . xcvr clock synchronized to PC clock on next minute
          rollover, to nearest 50 msec.
        . implemented for these transceiver:
          - ic7100, ic7300, ic7600, ic7610,
            ic7700, ic7800, ic7851
          - FT991, FT991A, FTdx10, FTdx101D, FTdx101MP
            FT1200:time only
          - TS990
        . corrected deactivated controls on some supported xcvrs

    TX500
      * Add Lab599 TX500 transceiver

    cw generator
      * update to timing intervals for CW generator

    ftdx101d
      * fix table lookups for bandwidth

    FTdx10
      * add as independent transceiver backend
        . shares many identical CAT commands to FTdx101D

    FT1000MP
      * correct read vfo A/B conversion logic

    cw invert
      * allow user to specify DTR/RTS either normal (+) or
        inverted(-) signaling.

    Power control
      * change to floating point control to allow for
        fractional changes in power level, i.e. 0.1 W / step

    elad
      * Add ELAD FDM-DUO qrp transceiver

    g90 cw/power/swr
      * set CW/CWR tuning sense
      * update power/swr methods

    K3 power level
      * add OM; read for power level min/max/step initialization

    Disable Polling
      * USE to test various comms issues between flrig and transceiver
        . allow user to disable polling
        . allow user to disable xmlrpc server

    Transmit meters
      * FT991A reported as not showing power out during transmit cycle

    cmedia/serial port
      * allow both serial port and cmedia devices to be initialized
        during startup

    K3/KX3/KXPA metering
      * correct smeter conversion
      * read KX3 power out when KXPA is in standby mode
      * Add code to read SWR from KXPA if active
        . note: the KXPA100 programmers guide
      * Add get trace for KXPA swr reads

    IC7851/9610/9700
      * Change get/set vfoA/B to use x25, x26 command strings
      * correct set/get bandwidth by mode/data/filter

    KX3 ptt/if-shift
      * add get_PTT
      * add reset IF shift control based on current mode
      * add has_ptt_control as test for get_PTT call
      * poll for change in KXPA presence with poll of
        power level setting.  Perform test during both Rx and Tx status

    kx3_options
      * use GET OPTIONS to discover KXPA100 presence

    kx3 extras
      * add programmed support for KXPA