WSL does not seem to have /proc/net/snmp. Convering this error to debug
message since there is nothing actionable on this. This only impacts UI
functionality cosmetically as UI won't be able to display TCP retransmit
count.
* Add support for custom ports for server. This allows listening on ports other than default ports.
Also add support for OS in travis CI. Ignore failures on go version master and windows since it results in go command not found error on Travis windows builds.
* gofmt
* Use ASCII symbols on CJK console
* text width should be calculated as cell width
* Add offset for x to adjust point to start multi-byte letters
Ethr is a network performance measurement tool. It allows measurements
of bandwidth, latency, packets/s, connections/s for multiple protocols
such as TCP, UDP, HTTP, HTTPS and ICMP.
