Please add command line option for reducing log verbosity

[niels-moller]

Hi,

we're running a network service with a yubihsm as signing oracle, and our service generates requests to the yubihsm-connector every 10s (+ additional requests from the keep-alive logic in the yubihsm-go client library).

The connector generates logs at info-level for each successful requests (which makes sense), but these messages fill up our logs.

See

yubihsm-connector/api.go

Line 119 in e406394

clog.WithFields(fields).Info("handled request")

There is a --debug option to increase verbosity, but apparently no way to decrease verbosity. It would be nice with a --level=warn option or corresponding config file setting, to silence all the info messages.