Bugfix: Shared memory segment weren't read properly (-w)

Signed-off-by: nixnodes <code@eth.si>
Latest: 1.7-4

Signed-off-by: nixnodes <code@eth.si>
Kills any matched transfer that is under $MINRATE bytes/s for a minimum
duration of $MAXSLOWTIME

Signed-off-by: nixnodes <code@eth.si>