(\onepageout): Leave space for the footline if present.
(\oddfootingxxx),
(\onepageout): Leave space for the footline if present.
(\everyfootingxxx, \everyheadingxxx): Call \oddfootingxxx and
\evenfootingxxx instead of repeating their code.
From: Stephen Gildea <gildea@intouchsys.com>.