Make https binding mandatory

index.html

@@ -2196,6 +2196,14 @@ <h1>Bindings</h1>
 	<p>This section defines bindings for the abstract algorithms in sections <a href="#resolving"></a> and
 	<a href="#dereferencing"></a>.</p>
 
+	<p>
+		All remote <a>DID resolvers</a> MUST implement the GET version of the
+		<a href="#bindings-https">https binding</a> and MAY implement the POST version. 
+		All <a href="#bindings-https">https bindings</a> MUST use TLS. Use of DNS names 
+		in certificates is NOT REQUIRED; resolvers MAY use TLS certificates issued for IP addresses 
+		(e.g., Let's Encrypt-style IP certificates).
+	</p>
+
 	<section id="bindings-https">
 		<h2>HTTP(S) Binding</h2>
 		<p>This section defines a <a>DID resolver</a> <a>binding</a> which exposes the