Support enable_long_queue_ids=yes

Did you ever run into issues without long_queue_ids? (In practice this works quite well!)

I think the issue here was that postfix did not use the long ids in all its log messages, and those ids are needed for the Tracking Center to do the matching.
see also:
https://bugzilla.proxmox.com/show_bug.cgi?id=2091
 
@Stoiko Ivanov

Without long_queue_ids, queue ID is not unique! Sometimes queue ID is duplicated, I faced with this issue many times and this makes me confused.
 

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