Bug#1109892: Resolution for: Installer reports: UserWarning: Retry and timeout are misconfigured. Set retry larger than timeout

[David Koski]

Putting this into my local config /etc/mailman3/mailman3-web.py:
Q_CLUSTER = {
     'timeout': 300,
     'retry': 360,
     'save_limit': 100,
     'orm': 'default',
     'poll': 5,
}

..fixed the problem.  Looks like the default had no 'retry' and 
defaulted to something less than 300, possibly 60,

David Koski