Bugs Reported (nor reproduced):
 *. Test incoming network packets of various sizes at different periods
 
New Features:
  *. UART-compliant signals to switch to command mode, and to reset modem to Saved settings
  *. Add Multi-Punter support
  *. Allow protocols to work with ranges
  *. Create a Better LOAD and SAVEr (like CometMode), but base it on ... something else.
  *. SLIP support?
  *. PPP support?
  *. Support SSH interactive
  *. @19200, on C64 modem, extend start bit by 30 cycles
  *. Baud rate test command (what good is this? how do you send cmd if baud is wrong?!)
  *. SSL/SSH server sockets? 
  *. LYNX-like browser?

GPIO Pin assignments:   ESP12-E      ESP32     ESP-01    User port
 DEFAULT_PIN_AA                       16
 DEFAULT_PIN_HS                       15
 DEFAULT_PIN_WIFI                     0
 PIN_FACTORY_RESET                    0
 DEFAULT_PIN_DCD          2           14         2       H (bit 16)
 DEFAULT_PIN_CTS          5           13         0       D (bit 2 - Actual RTS (modem input))
 DEFAULT_PIN_RTS          4           15         (5V)    K (bit 64 - Actual CTS (computer input))
 DEFAULT_PIN_RI           14          32                 F (bit 8)
 DEFAULT_PIN_DSR          13          12                 L (bit 128)
 DEFAULT_PIN_DTR          12          27                 E (bit 4)
 DEFAULT_PIN_RX                                          C (bit 1)
 DEFAULT_PIN_TX                                          M (port A somewhere)
 DEFAULT_PIN_OTH                       4                 J (bit 32)
 **** remember that default_pin_cts and rts are mis-labeled here!
 
Connects to:    TXDDSRRXD
           R     U  U  U
   G       S     P  P  P                G
   N    5  E     9  9  9        9    9  N
   D    V  T     6  6  6        V    V  D
           
   1    2  3  4  5  6  7  8  9 10   11 12
  --  ---------------------------  ------
   A    B  C  D  E  F  H  J  K  L    M  N
    
   G    R--R  R  D  R  D  P  C  U    T  G
   N    X--X  T  T  I  C  D  T  P    X  N
   D          S  R     D  P  S  9       D
                                6
 Connects to:              *5v DSR
