Under fire from tens of thousands of users, the social networking site Facebook said early Wednesday it is reverting to its old policy on user information — for now. The site posted a brief message on users’ home pages that said it was returning to its previous “Terms of Use” policy “while we resolve the issues that people have raised.” The “Terms of Use” is the legalese tacked on to the bottom of most Web sites that details what the site’s owners can do with the information that users provide. Facebook, the Web’s most popular social networking site, has been caught in a content-rights battle after revealing earlier this month that it was granting itself permanent rights to users’ photos, wall posts and other information even after a user closed an account