title: How could a https site enable external http link without warning from browser?
body: <p>I have mixed content in my https website, but once I have http conent like external link to outside, the browser will warning "this is not a trusted site"</p>
  
  <p>As the links of http cannot be removed, how can I walk around this issue?</p>
  
  <p>Thanks for any suggestion.</p>