The value of the object tlsShgRestProtSrcMac indicates
how the agent will handle relearn requests for protected
MAC addresses received on SAP's belonging to this SHG.
When the value of this object is 'true' requests to
relearn a protected MAC address will be ignored.
In addition, if the value of tlsShgRestProtSrcMacAction
is 'disable', then the SAP where the protected source
MAC was seen will be brought operationally down.