Question Never seen this, what is it

Suddently today I logged on and log showed this. Never seen it before. Haven’t changed anything.

Apr  5 12:55:41 :: New connection.  Waking up.
Apr  5 12:55:41 :: CompressStart() in protocol.c is being called, but it doesn't do anything!
Apr  5 12:55:51 :: Losing player: <null>.
Apr  5 12:55:51 :: No connections.  Going to sleep.


Happened twice with about 15 mins apart


Have any of you see this ?

What happens ?

It's in protocol.c

static void CompressStart(descriptor_t *apDescriptor)
{
/* If your mud uses MCCP (Mud Client Compression Protocol), you need to
* call whatever function normally starts compression from here - the
* ReportBug() call should then be deleted.
*
* Otherwise you can just ignore this function.
*/
ReportBug("CompressStart() in protocol.c is being called, but it doesn't do anything!\n");
}