Advertised the state of BPDU guard functionality for this port.
If BPDU guard functionality fot this port is disabled or guard
functionality is enabled, but no BPDUs are received on this port,
then hmIfaceStpBpduGuardStatus is set to false(2) for this port.
If BPDU is received on an port with enabled BPDU guard functionality for this port
(hmIfaceStpBpduGuardEnable=enable(1)) and globally (hmSysStpBPDUGuardEnable=enable(1))
then hmIfaceStpBpduGuardStatus is set to true(1) and additionally IfAdminStatus for
this port is set to down(2).
Variable hmIfaceStpBpduGuardStatus can be reset (to their original values (=false))
with switching BPDU guard functionality globally off.
IfAdminStatus can be again reset to to their original values up() only manually.