title: Custom URL Scheme maximum URL length
body: <p>As per title, what is the maximum length a URL can be, when using a custom URL scheme with an app?</p>
  
  <p>e.g. If I'm launching another app via URL, and passing a blob of data using something like</p>
  
  <p>   myappscheme://some/path?data=0123456789ABCDEF</p>
  
  <p>how long can that string get before the URL gets cut off (or the system refuses to launch the other app at all)?</p>