Got a request from LW who says there are professors who teach the same course in winter and summer sessions and want a different course details entry for the two sections.

I modified the site so that the summer section of the courses.php page and the courses_by_prof.php page looks first for a file called "descriptionSummer.inc" in the appropriate course_handouts/[year]/[profname]/[coursenum] folder and if it finds that uses that for the details. If the page doesn't find "descriptionSummer.inc" then it looks for "description.inc" and if it finds that uses it, as it always has. I also modified the lines on each of those pages that controls the directory listing so that descriptionSummer.inc is not displayed.