with default config, you get 404 when accessing http://localhost/server-status with mod_status enabled.
Try adding:
RewriteCond %{REQUEST_URI} !=/server-status
to .htaccess. i.e. only do the rewrite thing if request isn't for server-status. so your .htaccess would look like this:
# Pass all requests not referring directly to files in the filesystem to
# index.php. Clean URLs are handled in drupal_environment_initialize().
RewriteCond %{REQUEST_FILENAME} !-f
# RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !=/favicon.ico
RewriteCond %{REQUEST_URI} !=/server-status
RewriteRule ^ index.php [L]