MFC 1.90->1.95: MFC all of the changes related to the "neworder"
processing -- EXCEPT that the default behavior is still to use the
"oldorder" processing. This allows people on 4.x-stable to try
out the "neworder" processing (either by `newsyslog -D neworder',
or by adding '<debug> neworder' to newsyslog.conf).

I plan to change the default to neworder in a week or two, and then
will remove all the oldorder code after a few more weeks.

PR: parts of this came from bin/25070 by Helge Oldach