A variety of minor changes. Allow users to set a debugging option via
the newsyslog.conf file. Rename one size-related variable, and move
another one from the stack into conf_entry. Add a routine to change
file-attributes (chown, chmod, chflags), instead of having several
places doing the same sequence of system-calls. A few cosmetic/style
changes.

These should not effect any users. Most of these probably look
pointless, but they are the "insignificant parts" of a much larger
update that I'll be committing soon. Doing these as a separate update
should make that update easier to read.

MFC after: 14 days