Force usage of what I (Romain) consider as good logrotate configuration for
now.

In order to stabilise it zodb path has to be calculated early.

Do not always use 'name' as filename, or it only generates one file...

It seems that <= works only for one section (parameters from deeper sections)
are not available on top one.

This reverts commit 6a1dc3da.

It seems that more then one section with <= is not supported correctly.

Storage name does not map required file name.