Comment 2 for bug 543620

When the error occured /opt/mailman existed AND /etc/mailman.cfg used to be like this:

p@mailman:~$ cat /etc/mailman.cfg
[mailman]
site_owner: <email address hidden>

# Which paths.* file system layout to use.
layout: dev

[paths.master]
var_dir: /opt/mailman

# [database]
# The class implementing the IDatabase.
# class: mailman.database.stock.StockDatabase

# Use this to set the Storm database engine URL. You generally have one
# primary database connection for all of Mailman. List data and most rosters
# will store their data in this database, although external rosters may access
# other databases in their own way. This string supports standard
# 'configuration' substitutions.
# url: sqlite:///opt/mailman/data/mailman.db
# debug: no