title: Public key pinning in a WKWebView
body: <p>According to caniuse.com iOS Safari 9.2 and 9.3 <a href="http://caniuse.com/#feat=publickeypinning" rel="nofollow">do not support TLS public key pinning</a> with the header <code>Public-Key-Pins</code>.</p>
  
  <p>How can I do public key pinning with a <code>WKWebView</code>?</p>