Rsyslogd: action ‘action-0-builtin:omfile’ ‘action-7builtin:omfile’

cf: https://ubuntu-mate.community/t/rsyslogd-action-action-0-builtin-omfile-resumed-module-builtin-omfile/24105

Edit /etc/rsyslog.conf and comment the following lines.

#
# Set the default permissions for all log files.
#
#$FileOwner syslog
#$FileGroup adm
#$FileCreateMode 0640
#$DirCreateMode 0755
#$Umask 0022
#$PrivDropToUser syslog
#$PrivDropToGroup syslog

Restart rsyslog