Revert 4 commits to configure which broke dependency handling

Revert "configure: Don't enable examples when --disable-everything is used"
reverted as the problematic commit will be reverted too
This reverts commit 02dfa64c.

Revert "Merge commit 'a2bb771a'"
This reverts commit e8ebcb00, reversing
changes made to 3bff005b.

Revert "Merge commit '21c750f2'"
This reverts commit 470bfab4, reversing
changes made to f97ee815.

Revert "Revert "configure: Revert recent changes to disable-everything""
This reverts commit f97ee815.

Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com>
Immediate commit suggested by BBB