Apache Reference: mod_autoindex, HeaderName
Document to Be Inserted at the Top of Index Listings
Syntax: HeaderName A
Example: HeaderName /common/header.html
Since: Apache 1.0
This directive sets the name of the document that will be
inserted at the top of an index listing. The filename
argument contains the name of the file to include and is treated as a
URI path relative to the one used to access the directory being
indexed. It must resolve to a document with a major content
type of ``text'' (for example, ``text/html'' or ``text/plain'').