Upgrading from 2.16.7 to 2.18

[Gervase Markham]

Alexis Sukrieh wrote:
> When Upgrading from <= 2.16.7 to 2.18, I'd like to keep the old 'params'
> file in order to restore the user defined settings (those that are
> available through editparams.cgi).

Of course. Bugzilla upgrades are designed to preserve this file. The 
upgrade code is in UpdateParams() in Bugzilla/Config.pm.

> Sadly, using a 2.16 version of 'params' in Bugzilla 2.18 does not seam
> to be possible: CGIs say that there is something wrong with the params
> file and ask for a second run of checksetup.pl.

Indeed not - there are lots of missing params.

> When I run a second time checksetup.pl, the params file is the 2.18
> default one and that mean that everything that was saved before is reset
> to default 2.18 values.

Really? That's not what's supposed to happen. Are you sure?

Gerv