[syslog-ng] syslog-ng 3.6 rebase

Hi, After integrating everything I could, I would like to rebase the current master to merge fixups into the base patches. This is the last such rebase in 3.6. You can see the rebased series in the "next" branch, I intend to reset the master branch to that history tomorrow evening. the HEAD of both branches are identical, only the history differs. In the meantime, you can submit patches either the current "master" or "next" branches, I'll integrate stuff to "next" myself. Thanks. -- Bazsi