[PATCH] BUG/MINOR: http: Fix conditions to clean up a txn and to handle the next request (no replies)

Willy,

Another fix (with some cleanup in other paches). The first one (and
probably the second one) can be backported. But I don't know if this is
mandatory. It is really tricky to find conditions where it could be a
problem.

Thanks
--
Christopher Faulet