monitor: Plot RX information with -a/--analyze

monitor: Plot RX information with -a/--analyze

This attempts to plot the RX information just as TX:

  Found BR-ACL connection with handle 256
        Address: XX:XX:XX:XX:XX:XX
        RX packets: 60/60
        RX Latency: 0-39040 msec (~20294 msec)
        RX size: 6-344 octets (~34 octets)
        RX speed: ~0 Kb/s

  100 +-+------------------------------------------------------------------+
       +|                                                                  |
       +|                                                       RX +-----+ |
       +|                                                                  |
       +|                                                                  |
       +|                                                                  |
        |                                                                  |
        |                                                                  |
   10 +-|                                                                  |
       +|                                                                  |
       +|                                                                  |
       +|                                                                  |
       +|                                                                  |
       +|                                                                  |
        |                                                                  |
        |                                                                  |
    1 +-|  + +                                                           + |
       +|  | |                                                           | |
       ++------------------------------------------------------------------+
        +       +        +       +        +       +       +        +       +
        0      5000    10000   15000    20000   25000   30000    35000   40000
                                   Latency (ms)

        TX packets: 22548/22547
        TX Latency: 3-73 msec (~11 msec)
        TX size: 6-850 octets (~847 octets)
        TX speed: ~568 Kb/s