Consider using notice for log.Info with syslog

[rs]

Most syslog systems do not log anything below notice level.

• macOS /etc/asl.conf:

? [<= Level notice] file system.log

• freebsd /etc/syslog.conf:

*.err;kern.warning;auth.notice;mail.crit		/dev/console
*.notice;authpriv.none;kern.debug;lpr.info;mail.crit;news.err	/var/log/messages

As a result, on those platforms, all log.Info are dumped unless the system configuration is changed. I'm thus proposing to set the syslog level of log.Info to notice.

Thoughts?