Log Message:
Changes 5.3.1:
 snmpd:
   - fix trap processing from SMUX peers
   - fix disman/event monitoring crashes
   - fix bug 1399369: ifNumber broken
   - fix re-init of daemons after SIGHUP
 snmptrapd:
   - fix bug 1420758/1458815: snmptrapd aborts/loops in select()
   - fix re-init of daemons after SIGHUP
 snmplib:
   - fix OID lookups for fully qualified object names (eg .iso.org)
 snmpusm:
   - performance improvement when changing localized keys
 perl:
   - The perl modules now check to make sure they're building
     against the proper Net-SNMP version.
 misc:
   - Coverity fixes