[rsyslog] output plugin calling interface

[Rainer Gerhards]

> then it is simpler to do so than it would be to have
> both the partial retry processing _and_ the output module issueing commits
> whenever it wants to.


Why? If I think about code, it is very hard to beat auto-commits in
simplicity...

But I'd better finish the new state diagram and at least part of the
description, I think I finally found the right model for the lower layer.

Rainer