The files in this "downloadsites" directory are not used during the build, but are releated. This files make up the "main" download pages, that list each of the builds. On the download server, they reside under /home/data/httpd/download.eclipse.org/eclipse The are stored here in this repository just to have a safe record of them, make them easier to compare/change etc., but there is nothing "automatic" about making them current or in synch with what is on the downlaod server, so its recommended, before making changes, to get a copy, manually compare with that's here, to see if things have changed but not be put into the repository.