Give administrators a clue that upgrading is possible, even straightforward.

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@@ -469,7 +469,17 @@ generally you want it to notice right away, so that you can test things.
Appendix C. Upgrading from previous versions of BugZilla
[This section under construction].
The developers of BugZilla are constantly adding new tables, columns and fields.
You'll get SQL errors if you just update the code. The strategy to update is
to read the CHANGES file backwards, and apply all of the instructions given,
typically things like:
./makeattachmenttable.sh
./makegroupstable.sh
alter table products add column disallownew tinyint not null;
Someday someone should write a script that queries the existing database
for all the required columns, and if any are missing, adds them.
Appendix D. History