[Dovecot] Multiple dovecot versions side-by-side

[Max Ivanov]

I'm current  maintainer of dovecot packages in ALTLinux distro and I
plan to make possible to install multiple dovecot versions
side-by-side (1.0, 1.1, 1.2) to make upgrade process easier and more
robust.

Is there any consequences of doing that?  I worry about locking
maildirs and mboxes, does dovecot handle it correctly if another
dovecot process tries to work on same mail location?