http://qb3.2ch.net/operate/kako/1047/10478/1047840578.html の 387
RewriteEngine on
RewriteCond %{HTTP:Accept-Encoding} gzip [NC]
RewriteCond %{REQUEST_FILENAME}.gz -f
RewriteRule (^.*[^/]+)\.(html|txt|dat)$ $1.$2.gz
RewriteCond %{HTTP:Accept-Encoding} gzip [NC]
RewriteCond %{REQUEST_FILENAME}index.html.gz -f
RewriteRule (^|/)$ %{REQUEST_URI}index.html.gz
