Log Message:
Update to CVSweb 3.0.4.

Notable changes from 3.0.1:

* Fixed tab expansion to not eat everything before a tab in HTMLized diffs.
* Improved support for the magic "." (== latest) revision on branches
  for download, view, and annotate URLs.
* Improved whitespace handling in "human readable" (HTMLized) diffs.
* The new cvsweb.conf parameter $DEBUG can be set to a true value in order
  to enable more output to the web server error log for troubleshooting.
* More robust URI escaping, links to paths/filenames containing unusual
  characters work better now.
* Visual, accessibility, and CSS class structure improvements.
* Minor optimizations and bug fixes.