Password sync plugin, and questions about plugin criticality

[Luke Howard]

>>Also, if you separate password quality checking from password
>>synchronization you can collapse these two functions into one.
>
>I don't think I can; some people absolutely want external password sync
>to happen before the password gets written locally; other people
>want the exact opposite.

Conversely, you can collapse them into one without separating
quality checking from pre-commit synchronization, as long as
the plugin can return some value which indicates whether the
password change should be aborted.

-- Luke

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