Once SNMP operations like agApplyConfig, agDiffState and
agDumpState, which use the state machine are done the resources
used by these operations need to be freed by setting the state
back to 'idle' so others can issue the commands via SNMP.
agSnmpTimeout indicates the number of minutes before the resources
are freed and the state set back to 'idle' if this operation is not
performed by the user.