ping_test.go | 5 5 + 0 - 0 !
1 file changed, 5 insertions(+)

 disable network tests

ping.go | 1 0 + 1 - 0 !
1 file changed, 1 deletion(-)

 do not set default traffic class

Do not set default traffic class 192 (DSCP CS6) in pinger, as it seems
to result in flaky responses with some devices.

Bug: https://github.com/prometheus-community/pro-bing/issues/134