Each individual call to "tc" should be checked for error, else we
may fail to catch specific tc errors caused, for instance, by a
kernel configuration that only contains some of the required
class modules.
Also, invoke the utils.sh full_cleanup function from the script-specific
interrupt_cleanup trap handler rather than try to perform stopping
of relayd and sessiond within the script.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>