Print Stats on Handshake issues

[nibanks]

Prints stats on issues found with the handshakes:

$ quicreach google.com,msquic.net,cloudflare.com,facebook.com,youtube.com --stats
                        SERVER           RTT        TIME_I        TIME_H           SEND:RECV      C1      S1
                    google.com      2.474 ms      2.727 ms      5.396 ms    2440:8229 (3.4x)     269    6801    *
                    msquic.net     66.376 ms     66.793 ms    131.323 ms    2440:3729 (1.5x)     269    3461    *
                cloudflare.com      2.276 ms      4.081 ms      5.338 ms    1220:5157 (4.2x)     273    2695    *
                  facebook.com      2.143 ms      4.317 ms      5.062 ms    1220:4482 (3.7x)     271    3218    *
                   youtube.com      2.236 ms      2.414 ms      5.171 ms    2440:8224 (3.4x)     270    6800    *

5 domains reachable
(*) 5 domain(s) required multiple round trips