Dangling External Calendar
External calendar, initially defined via curl, needed to be updated/replaced. Using the Davical 1.1.8 web admin tool, the new calendar was defined, then the older external calendar was removed - using the web tool. Subsequently, the web tool "list external calendar' page shows the new external calendar but also has a line that reads "remove dangling external calendars(1". This is a link, but the page it loads gives the message "no page found to edit a external".