Web.mit.edu and www.mit.edu will check for a file named "HEADER"
and display its text above the index of files, and will check for a
file named "README" and display its text below the index of files.

Stuff.mit.edu will check for a file named "HEADER.html" and display
its html code above the index of files, and will check for a file
named "README.html" and display its html code below the index of files.

File names like "README" or "README.html" or anything starting with
"README" are suppressed from being shown in the directory index.
File names like "HEADER" or "HEADER.html" or anything starting with
"HEADER" are suppressed from being shown in the directory index.