package/mosquitto: bump version to 1.6.5

package/mosquitto: bump version to 1.6.5

Bugfix release, fixing a number of issues:

- Fix v5 DISCONNECT packets with remaining length == 2 being treated as a
  protocol error.  Closes #1367.
- Fix support for libwebsockets 3.x (excluding 3.2.0)
- Fix slow websockets performance when sending large messages.  Closes
  #1390.
- Fix bridges potentially not connecting on Windows.  Closes #478.
- Fix clients authorised using use_identity_as_username or
  use_subject_as_username being disconnected on SIGHUP.  Closes #1402.
- Improve error messages in some situations when clients disconnect.
  Reduces the number of "Socket error on client X, disconnecting" messages.
- Fix Will for v5 clients not being sent if will delay interval was greater
  than the session expiry interval.  Closes #1401.
- Fix CRL file not being reloaded on HUP.  Closes #35.
- Fix repeated "Error in poll" messages on Windows when only websockets
  listeners are defined.  Closes #1391.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>