tfrc: Use computed average of the segment size at the sender
tfrc: Use computed average of the segment size at the sender

pexip/farstream,tieto/farstream,kakaroto/farstream,pexip/farstream,pexip/farstream,pexip/farstream,tieto/farstream,shadeslayer/farstream,shadeslayer/farstream,kakaroto/farstream,shadeslayer/farstream,tieto/farstream,kakaroto/farstream,kakaroto/farstream,shadeslayer/farstream,tieto/farstream,tieto/farstream