option to disable module logging

[rptaylor]

The logging is always voluminous and sometimes unnecessary and undesired, it would be good to be able to disable it with an env var.

[mboisson]

I would favour configuring your rsyslog to do something with the lmod-1.0 tag: https://serverfault.com/questions/514901/how-to-filter-rsyslog-messages-by-tags

or filtering them after the fact grep -v lmod-1.0 /var/log/messages