moved to module scope to become accessible by wrapper routines
(v1.py/v2c.py). This is used for setting strictly typed default values
to corresponding SNMP data structures.
+- A caching maps implemented at rfc2576 subsystem to speed-up communityName
+ to/from securityName resolution. The also makes transport tags processing
+ better compliant to the standard.
- Fix to rfc2576:processIncomingMessage() to take SecurityModel into account
when lookup up SecurityName by CommunityName. This allows mixed SNMPv1/v2c
communication with the same target.