A entry for a message string label for the current contents
of a static (agent-generated) message string object, in some
MIB implemented by this host system.
Conformance: XCMI conforming management agents SHALL
support SNMP Get requests to the 'xcmGenMessageMapTable'
(ie, agents must respond to valid explicit EXACT requests).
When 'xcmGenMessageMapTable' is currently 'hidden' via
'xcmGenBaseGroupWalkHidden', XCMI conforming management agents
SHALL skip over 'xcmGenMessageMapTable' to the next
lexicographically higher object for GetNext or GetBulk requests
- 'xcmGenMessageMapTable' SHOULD be invisible to MIB walks,
to avoid undesirable performance degradation with third-party
network management stations and other monitoring tools.