bug#5513: Archives disregard special mode-class

[Stefan Monnier]

> I think all `view-buffer' calls should respect the property `mode-class',
> so I moved this code from `view-file' to `view-buffer'.  `view-buffer-1'
> is a new function with the old content of `view-buffer' for the case when
> some package would prefer to ignore `mode-class' for some reasons.

> I hesitate to install this patch now because it changes the behavior of
> `view-file' for a non-critical bug.

Indeed, in this form I don't think it's acceptable for `trunk'.
If you switch the names around, OTOH it should be safe.


        Stefan