Bug#630985: postinst: Isn't the paranoia in handling BerkeleyDB upgrades way too aggresive?

[Regid Ichira]

Package: exim4-base
Version:  4.76-2
Severity: normal


  4.76-2's postinst has a paranoia code to handle BerkeleyDB upgrades.
On any db upgrade, it throws away hints databases.
1. A possible ratelimit db is not mentioned.
2. I think the paranoia code is not required.  Won't an exim_dumpdb fail 
    due to an incompatible upgrade?  exim_dumodb is run for each db
    a few lines down in the postinst.  It meant to point invalid db hints 
    files that need to be reset.