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.

as well as some work in preparation of storing doAction params inside
the batch

messages could get lost or be duplicated due to non-proper sync
of transactions. This is a notable slowdown again, but we know
how to get back concurrency, it just takes "some" more programming.
It is important now to come back to correct code, so that we can
base further improvements on that.

things like ACL check and message parsing. This leads to a greater level
of concurrent processing. Beware, though, that this commit duplicates
some messages. May be a regression from this or an earlier commit. I will
soon sort out.

... but only for batch enqueues. This will not help much with
the current code, but will play well with upcoming changes.

also: bugfix: mutexes used to similate atomic instructions were not destructed

and also provided four build-in modules for the most common use
cases, hopefully resulting in a speedup of around 5% for typical
rsyslog processing.