Opportunistic quota recalc

[Tom Sommer]

I'm switching quota backend to redis (from maildir++), so all my current 
usages are reset.

I get that I can do "doveadm quota recalc -A", but it takes forever (and 
auth processes time out/crash).

It would make much more sense to recalc the usage on login if the 
current usage is unset. Is there no way to do a 
recalc-quota-on-first-login?

Thanks.

--
Tom Sommer