Overhaul of spam protection to use an extension on Form rather than the SpamProtectorManager. More fluent interface and easier to replace the built in spam protection api with an alternative.
The class "Comment" was actually defined by
phing/filters/StripLineComments.php. Since I have installed
phing globally through composer, its automatically in the include_path.
That's a separate problem, but this is a viable workaround.