Revert "Remove XBT_INFO call"
This commit changes much much more than wanted. In particular, it
reverts several changes done in the tree recently. I assume that the
merge that occured just before this commit went awfully wrong,
actually.
That's ok, shit happens, don't worry.
Nevertheless, I revert this commit when it's still possible, before
the first unrelated commit on top of it. Pierre, please, pick your
changes back from the diff, and resubmit them.
This reverts commit
f9e6853d2c5b7b867211700bc12f0ee57f640b30.