Simplify .htaccess IndexIgnore/DirectoryIndex

There are no files at all for most of these patterns, and favicon.ico +
favicon.gif + robots.txt would only exist in the root, where there is an
index file and IndexIgnore as no effect.

Author: foolip

whatwg.org/.htaccess

@@ -14,8 +14,8 @@ AddType image/gif .gif
 # Indexing Options
 IndexOptions DescriptionWidth=* NameWidth=* FancyIndexing FoldersFirst ScanHTMLTitles
 # also add SupressHTMLPreamble once we use HeaderName and some fancy CGI
-IndexIgnore .htaccess *~ .#* #*# CVS .svn favicon.ico favicon.gif robots.txt
-DirectoryIndex index index.cgi index.xml index.html index.txt
+IndexIgnore .htaccess
+DirectoryIndex index index.html
 ReadmeName README
 
 # set up the README files to be plain text