[Dovecot] NULL for password and proxy fields

[WJCarpenter]

>> 2.  It looks like any value at all for the "proxy" field in the passdb
>> lookup turns proxying on.  The one exception is a value of NULL for
>> "proxy", in which case proxying is not turned on and proxy-related
>> other fields are ignored.  Is that how it's intended to work?
>>     
>
> Yes. It might change in some future release, but currently I'm not
> planning on changing it. 'Y' would anyway be a future-safe choice.
>
>   

Thanks for the information.  I was actually asking about the other side 
of the coin ... is it safe to assume that "proxy=NULL" will disable the 
proxying, at least for the 1.0 series?  (I saw the "proxy_maybe" for 
1.1, which is also OK for me when I get to that release.)