The state of the SNMP-invoked mrbranch facility. Only
one such mrbranch may be in progress at a time. When this
object has the value 'inactive', setting it to 'active'
causes an mrbranch to be invoked using the values of
mrbranchGroup, mrbranchBranch and mrbranchTimeout which
were set either concurrently or most recently. The value
stays 'active' until the mrbranch completes/times-out at
which time it becomes 'inactive'. Setting this value to
'active' when it is already 'active' it is an error.
Setting it to 'inactive' either cancels the active
mrbranch or is a no-op.