RewriteEngine on
RewriteCond %{HTTP_HOST} ^(.*)$ [NC]
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule ^(.*)$ http://www.%1/$1 [R=301,L]
RewriteCond %{HTTP_HOST}/
RewriteRule \?inc=forum.*topic=$1 %{HTTP_HOST}/forum/topic$1
RewriteRule \?inc=$1.* %{HTTP_HOST}/$1.html
ErrorDocument 404 404.html

<IfModule mod_expires.c>
    ExpiresActive On
    ExpiresDefault "access plus 3 month"

    ExpiresByType js/javascript "access plus 6 months"
    ExpiresByType text/css "access plus 2 month"
    ExpiresByType image/png "access plus 2 month"
    ExpiresByType image/jpeg "access plus 2 month"
</IfModule>

<IfModule mod_deflate.c>
  AddOutputFilterByType DEFLATE application/javascript
  AddOutputFilterByType DEFLATE text/javascript
  AddOutputFilterByType DEFLATE text/css
  <IfModule mod_setenvif.c>
    BrowserMatch ^Mozilla/4 gzip-only-text/html
    BrowserMatch ^Mozilla/4\.0[678] no-gzip
    BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
  </IfModule>
</IfModule>