Unfortunately, the solution for the other bug (changing /etc/default/snmpd options to -LS6d from -Lsd) did not stop the ia_addr message spewing in syslog. I note that on Ubuntu 16.04.5 i386 that using 'dpkg -l | grep snmpd' reports: "5.7.3+dfsg-1ubuntu4.2 i386" whereas Ubuntu 18.04.1 amd64 that using "dpkg -l | grep snmpd" reports "5.7.3+dfsg-1.8ubuntu3.1 amd64" which is possibly the source of the discrepancy.
Unfortunately, the solution for the other bug (changing /etc/default/snmpd options to -LS6d from -Lsd) did not stop the ia_addr message spewing in syslog. I note that on Ubuntu 16.04.5 i386 that using 'dpkg -l | grep snmpd' reports: "5.7.3+ dfsg-1ubuntu4. 2 i386" whereas Ubuntu 18.04.1 amd64 that using "dpkg -l | grep snmpd" reports "5.7.3+ dfsg-1. 8ubuntu3. 1 amd64" which is possibly the source of the discrepancy.