RewriteEngine on
RewriteCond $1 !^(index.php|resources|admin_resources|tmp_preview|favicon.ico|images|css|js|README.html)
RewriteRule ^(.*)$ index.php [L]
SetEnvIfNoCase ^Authorization$ "(.+)" PHP_AUTH_DIGEST_RAW=$1
# if the above does not work, use this instead
#RewriteEngine on
#RewriteRule ^(index.php|resources|admin_resources|tmp_preview|images|css|js|favicon.ico) - [L]
#RewriteRule .* index.php [L]
#SetEnvIfNoCase ^Authorization$ "(.+)" PHP_AUTH_DIGEST_RAW=$1
