- moved module loader from conf.c to module.c, where it belongs
- made the necessary plumbing to auto-load library modules
- upgraded debug system to include iRet in function exit message
- changed module interface so that instances need only to be supported by
    output plugins (if we actually need them for input plugins, we can
    always add it again...)
- milestone: first implementation of library modules (but do not get
    unloaded on exit/hup so far)

- changed module interface version, as the interface change is quite large

- implemented management function for worker thread 0 in order to change
    queue workers dynamically -- stage work

    was specified in rsyslog.conf
- fixed a bug that caused a segfault on queues with types other than "disk"
- removed the now longer needed thread TermSyncTool

    See newsgroup posting for details on the issue:
    http://groups.google.com/group/comp.programming.threads/msg/330b9675f17
    a1ad6 I tried some mutex operations but came to the conclusion that
    this does not really help. So I have now switched to plain thread
    cancellation, which so far seems to be OK. Need more practical
    experience with other input modules to make a final decision. Thus I
    leave all code in and have just disabled the problematic code.