                Community/Context Indexing

This simulator is associated with two data files. The community/context of
the first data file is public1, and public2 for the second data file. 

If the agent is SNMPv1/v2c agent, community names are used. If it is an 
SNMPv3 agent, the value of readCommunity becomes the context name. SNMPv3
parameters are
User: newUser
Auth algorithm: MD5
Auth password: abc12345
Priv algorithm: DES
Priv password: abc12345
Context: public1 or public2

Note that the context settings in the config file (SnmpSimulator.xml):

   	contextPrefix="pub"
	match="prefix"

The default settings were match="exact". Because both of context names start 
with pub, so it was changed to prefix match.

If you use SNMP managers to check agent's values, you will notice that different
data is returned for different community/context.


