Require servers to use text/javascript for JavaScript

See bmeck/I-D#2 for context.

source

@@ -58377,6 +58377,11 @@ o............A....e
    <li><code>text/x-javascript</code>
   </ul>
 
+  <p>Servers should use <code>text/javascript</code> for JavaScript resources. Servers should not
+  use other <span data-x="JavaScript MIME type">JavaScript MIME types</span> for JavaScript
+  resources, and must not use non-<span data-x="JavaScript MIME type">JavaScript MIME
+  types</span>.</p>
+
   <div w-nodev>
 
   <p>User agents are not required to support JavaScript. This standard needs to be updated if a
@@ -120175,6 +120180,7 @@ INSERT INTERFACES HERE
   Brad Fults,
   Brad Neuberg,
   Brad Spencer,
+  Bradley Meck,
   Brady Eidson,
   Brandon Jones,
   Brendan Eich,