Do we really want/need this? Imagine for instance a server which advertizes 50 SRS and contains 50 layers... thbose are fairly low numbers for WMS services but would result in 2500 bbox entries, most of them possibly invalid because the bbox is outside the projections' mathematical limits and the reprojection of the bbox results in invalid values.
If you do this then that should be done in a smart way to avoid unnecessarily bloating the Capabilities output, either generate bboxes only for some selected SRS (listed in a new metadata entry), or there should be some limit to the number of bboxes that are generated, or make this disabled by default, or ???
