title: Invalidate cached .htaccess file
body: <p>Working on launching a new site for a company. Prior to my work on the site, the company was redirecting traffic from their domain (call it realcompany.com) to a third party service (call it realcompany.thirdparty.com).</p>
  
  <p>This was done via an htaccess file that does not specify any expiration time period.</p>
  
  <p>The concern for launch, of course, is that existing users will wind up getting a cached htaccess file and will hit the old URL, not the new site.</p>
  
  <p>Is there anything that can be done to invalidate the existing htaccess file?</p>