[rsyslog] audit-grade queue / batching

[Rainer Gerhards]

Hi all, and especially David,

contrary to what I intended, I have gone back to the text processor to sketch
down what I intend to do. It turned out that looking at the code and doing
small micro-modifications was counter-productive without a "big picture" (a
sign of the magnitude of the change... ;)).

So I have updated the design document, especially added section 4.6 (still,
it contains a lot of not-yet-updated information!).

http://www.rsyslog.com/download/design.pdf

One important design decision is documented at the end of 4.6.2 and I would
appreciate feedback on it. Note that even 4.6.2 is not yet fully completed,
but what is there is consistent. It will probably take me at least another
day to get the full intended design for the ultra-reliable queue into the
document (and make my mind clear about it). But, again, what is in the
document is consistent, "just" some algorithms are missing. So please do not
wonder that not everything is described.

Rainer