Page-footnote flow objects behave rather strange, if
the left-margin of the overall page is > 0.
(1) To be precise: the footnoterule is always
leftbound, no mater what left-margin, start-indent,
etc. is set.
(2) There's no way to switch off the horizontal line
(except for setting some latex internal code in
jadetex.cfg overriding \footnoterule)
(3) Too much space between multiple paragraphs in
footnotes.
(4) There's always a gap after the last paragraph.
(5) start-indent, first-line-start-indent, etc.
properties are ignored for paragraphs children for
page-footnote, unless they are packaged inside another
paragraph (nest paragraphs).
I've fixed jadetex.dtd at least for (1)-(4), but don't
have an answer or solution for (5). I'm not sure if the
patches break any other dependency, since I don't
understand all details of the jadetex logic.