Signed-off-by: Rainer Gerhards <rgerhards@adiscon.com>

see commit for reasoning

Note that, as it looks, the directive was already broken in previous v5 versions.
So while I solved what looked like a (intentional) regression from the
performance tuning, I actually solved a previous regression as well ;)

I have also added new test cases to the testbench in order to capture such
problems in the future. This version does now look pretty good in shape.

by implementing some code that was missing so far ;) as well as
finding some real bugs. I also did some general cleanup, removing
debug strings and such. This code should be fairly OK to use, except
when "exec only when previous action was suspended" is used -- this is
NOT yet re-implemented in the tuned engine.

at least in important cases (not for non-direct action queues and some
other minor things). This version is definitely buggy, but may be tried
with success on a non-production system. I will continue to work on the
correctness, but needed to commit now to get a baseline.

Now, the full batch is passed down to the rule, which then enqueues
the elements as single messages. Note that this code has some known
defects and needs more changes until it is correct again. This is
primarily a commit to be able to return to a known-(somewhat)-good
state.