Lee Howard

This status indicator should default to retry rather than failed.

Add support for libtiff 4.7.x

Try to cope with T.38 invite stutter at beginning of receive.

Mark sender as confusing RTN if they just hang up after RTN.

Stop TSI and DCS from interfering with our PPMseq

Just updating the code comments. There's nothing more, really, to do about this situation.

lastPPM and prevPPM cannot be trusted for the purpose of detecting senders who confuse RTN because we specifically modify lastPPM in the event that we send RTN.

A sender who transmits MPS and then, on the Phase C subsequent to RTN, transmits EOP does not appear to be retransmitting the page and has confused RTN.