NPAPI/XPI support in native gecko apps and other ports

[Andrew Pantyukhin]

I have a very simple patch which should enable
xpi/npapi support for gecko apps. Please review
and comment.

http://people.freebsd.org/~sat/diffs/gecko.plug.diff

Michael, I see you're going with the separate port.
Well, it's good to have more than one solution to
the same problem, but it would be great to hear
your thoughts, even most reproving ones.