[Dovecot] Something other than dotlock for uidlist locking?

[James Berry]

If I read the code correctly, only dotlocks are supported for locking  
of dovecot-uidlist. And I don't see any settings in the config file  
for it.

As it turns out, dotlocks are very slow on my system, due to their  
implementation via hardlinks.

Would it be possible to support other locking mechanisms for locking  
of the uidlist file?

-jdb