mosquitto_pub: split main loop.

Fix test on invalid null will topic value in connect packet

Fix test on invalid reserved bit value in connect packet

Add send of pubcomp in 02-subpub-qos2 script. To keep the broker session working while launching several tests on the same broker, the last packet of this transaction must be sent.

Fix way of sending packets in compliance tests. According to the documentation of python 3 socket::send method (https://docs.python.org/3/library/socket.html#socket.socket.send), the call to send must be retry until all data is sent while sending packet with a "large" amount of data.

Signed-off-by: Jerome Malinge <gromgromm@yahoo.com>

Signed-off-by: Jerome Malinge <gromgromm@yahoo.com>

To keep the broker session working while launching several tests on
the same broker, the last packet of this transaction must be sent.

Signed-off-by: Jerome Malinge <gromgromm@yahoo.com>

According to the documentation of python 3 socket::send method
(https://docs.python.org/3/library/socket.html#socket.socket.send

),
the call to send must be retry until all data is sent while sending
packet with a "large" amount of data.

Signed-off-by: Jerome Malinge <gromgromm@yahoo.com>

They would be be sent without an expiry interval property just before
they were expired.

Closes #1464. Thanks to Dustin Sallings.

This happened after being restored from persistence.

Closes #1464. Thanks to Dustin Sallings.

Closes #1478. Thanks to Liam Fry.

Closes #1463. Thanks to raisonchacko.

Closes #1459. Thanks to Thomas Markin Klein.

Closes #1453. Thanks to jveber.

Main loop has two different logics inside: one for stdin input,
second for all other cases. Exit loop condition is also different
for both variants. This commit splits these two variants into
two separate loops.

Signed-off-by: Marek Wodzinski <majek@w7i.pl>

Closes #1442. Thanks to charlemagnelasse.

Closes #1441. Thanks to Christoph Krey.

Closes #1437. Thanks to Guillaume Bour.

Closes #1432. Thanks to Magnus Galåen.

Closes #1429. Thanks to Dustin Sallings.

Closes #1424, #1425. Thanks to JinPingChng and peteakalad.

Closes #1415 and #1422. Thanks to Karl Palsson, Till Zimmermann and Liam Fry.

Also update client documentation about automatic client ids.

Closes #1418. Thanks to Lichard Torman.