peter's gbuildifications caused and ocean of red, that
1/ was not followed up by any attempt by the author to fix
2/ I wasted a good part of the weekend to de-entangle with
only partial sucess

reverting the whole mess for now...
to be resubmited when a bit less borked...

This reverts commit c4c160a4.
This reverts commit faef2e51.
This reverts commit 057ce1fe.
This reverts commit a7d34af3.
This reverts commit befae0ce.
This reverts commit 433b43bc.
This reverts commit 93e2c4a9.