This is a security fix, affecting 2.0.0 through to 2.0.9. Mosquitto instances
could be remotely DoS'd by authenticated clients.
Release notes at: https://github.com/eclipse/mosquitto/blob/v2.0.10/ChangeLog.txt
CVE number has not yet been assigned.
Signed-off-by: Karl Palsson <karlp@etactica.com>