#67244 by Steve Dondley and Morbus Iff, write out a more compatible files/.htaccess., babkport from head

backport from HEAD

edited for some formatting issues.

  If your module uses variable_get('file_directory_temp', ...) or
  variable_get('file_directory_path', ...) please update it to use the new
  API.

  A list of affected modules is available at http://drupal.org/node/26249#comment-54194.

- Patch #26249 by crunchywelch, Junyor: use upload_tmp_dir as default temporary directory.  Fixed file problems on Windows NT systems.

- Patch #28482 by Uwe: add CVS $Id$ tags to all source files in Drupal core. This allows admins to know exactly which version of which files they use. In addition I want to use CVS $Id$ tags in my upcoming security.module to check for possible vulnerabilities. That's not possible if some files simply don't have $Id$s.

Note: I also (mostly) unified the tags to use the "// ID" form instead of "/* ID */", but that's more of a cosmetic issue. I'm not sure whether *.txt files and the stuff in themes/ need tags(?).