asynInterposeEos's readIt() might be printing an unnecessary warning

[ericonr]

It is calling the underlying IPPort's read() function to flush the input; this makes it so it returns asynTimeout to StreamDevice, which deals with it just fine. However, since it's flushing the input with pasynUser->timeout=0, does it make sense for the "read from low-level driver returned 1" message to be a warning? It can easily pollute the warning output if one has a lot of SCAN records... Perhaps the message can be disabled or turned into an ASYN_TRACE_FLOW if pasynUser->timeout==0 && status==asynTimeout ?

From https://epics.anl.gov/tech-talk/2023/msg00466.php