planner-calendar: Make « and » work
* planner-calendar.el (planner-calendar-prev-month-href)
(planner-calendar-next-month-href): Don't escape specials specials in
the URL description. This should fix a bug with "«" and
"»".
* planner-publish.el (planner-publish-ignore-url-desc-specials): New
variable that determines whether to ignore specials in URL
descriptions.
(planner-publish-decide-specials): New function that uses this
variable.
("planner-xml", "planner-xhtml", "planner-xhtml"): Set :specials to
planner-publish-decide-specials.
git-archimport-id: mwolson@gnu.org--2006-planner-el/planner-el--devel--0--patch-125