title: non-public API in App, __strlcat_chk, __strlcpy_chk
body: <p>During my iphone app (iOS7) submission process, I saw the errors shown in the screen. Basically, it says I used non-public symbols __strlcat_chk, strlcpy_chk, I know strlcat and strlcpy, but don't think it could be non-public.
  I used Xcode 5.</p>
  
  <p>I also did a quick search strlcat() and strlcpy() in my project, I didn't see I used it.<img src="https://i.stack.imgur.com/r37oh.png" alt="the app uploader shows the error screen"> </p>
  
  <p>Any idea what could be the reason. </p>
  
  <p>[Update] I actually got update from Apple, after submitting my ticket through my developer account (We all have 2 tech supports coming with the developer account.) Basically, Apple Support told me it's known issue. Tell apple your app name and id number, your app will be whitelisted. There will no problem to go through the submission verification process once Apple gives a Go signal.</p>