document option to disable connectivity checks

static/faq.html

@@ -764,6 +764,12 @@
                                 <li>HTTP fallback: http://www.google.com/gen_204</li>
                                 <li>HTTP other fallback: http://play.googleapis.com/generate_204</li>
                             </ul>
+
+                            <p>GrapheneOS also adds the ability to fully disabled the connectivity
+                            checks. This results in the OS no longer handling captive portals
+                            itself, not falling back to other networks when some don't have
+                            internet access and not being able to delay scheduled jobs depending
+                            on internet access until it becomes available.</p>
                         </li>
                         <li>
                             <p>DNS connectivity and functionality tests</p>