Only do footnoteref processing if process.footnotes is enabled.
Only do footnoteref processing if process.footnotes is enabled.

macmillanpublishers/HTMLBook,gitenberg-dev/HTMLBook,wastemobile/HTMLBook,oreillymedia/HTMLBook,gitenberg-dev/HTMLBook,mushroomgithub/HTMLBook,wastemobile/HTMLBook,mushroomgithub/HTMLBook,mushroomgithub/HTMLBook,oreillymedia/HTMLBook,macmillanpublishers/HTMLBook,macmillanpublishers/HTMLBook,gitenberg-dev/HTMLBook,oreillymedia/HTMLBook