Improve logging for KNI haproxy

Improve logging format of KNI haproxy logs to display tcplogs + frondend IP and frontend port.

The current logging format is not very verbose:

<134>Jun  2 22:54:02 haproxy[11]: Connect from ::1:42424 to ::1:9445 (main/TCP)
<134>Jun  2 22:54:04 haproxy[11]: Connect from ::1:42436 to ::1:9445 (main/TCP)
<134>Jun  2 22:54:04 haproxy[11]: Connect from ::1:42446 to ::1:9445 (main/TCP)

It lacks critical information for troubleshooting, such as load-balancing destination and timestamps.
https://www.haproxy.com/blog/introduction-to-haproxy-logging recommends the following for tcp mode:

When in TCP mode, which is set by adding mode tcp, you should also add [option tcplog](https://www.haproxy.com/documentation/hapee/1-8r1/onepage/#option%20tcplog).