Controls whether data sent via multicast transports using the specified socket can also be received by the sending
host via loop-back. A value of zero disables the loop-back functionality, while the default value of 1 enables the
loop-back functionality. Leaving multicast loop-back enabled when it is not required can have a negative impact
on performance. Where possible, disable McastLoop in production environments.
Flag indicating whether or not loopback multicast is enabled