Website: list the machine estimator — menu, sitemap, FAQ and apps-page links; R-997 closed

noindex and the robots Disallow lines removed; both URLs in the sitemap with their hreflang pair; the pair
moves from UNLISTED to TWINS in site_gates.py. The explaining sentence's base figure was already the drawn
box's base; a test now pins it (red-proved).

website/en/faq.html

@@ -77,7 +77,7 @@
           "name": "What machine do I need?",
           "acceptedAnswer": {
             "@type": "Answer",
-            "text": "For most homes a mini PC (for example with an Intel N100 processor and 16-32 GB of RAM) is perfectly fine. They are quiet, energy-saving (15-35 W) and compact – one fits on the shelf next to the router. If you want more storage (for a film library, say), you can add a NAS or external hard drives. More detailed set-ups are on the Technology page."
+            "text": "For most homes a mini PC (for example with an Intel N100 processor and 16-32 GB of RAM) is perfectly fine. They are quiet, energy-saving (15-35 W) and compact – one fits on the shelf next to the router. If you want more storage (for a film library, say), you can add a NAS or external hard drives. More detailed set-ups are on the Technology page. To estimate how big a machine your own apps need, use the Which machine do I need? page."
           }
         },
         {
@@ -398,6 +398,7 @@
                         <li><a href="/en/apps#home">Home &amp; Lifestyle</a></li>
                         <li><a href="/en/apps#productivity">Productivity &amp; Knowledge</a></li>
                         <li><a href="/en/apps#system">System &amp; Development</a></li>
+                        <li><a href="/en/sizing">Which machine do I need?</a></li>
                     </ul>
                 </li>
                 <li><a href="/en/technology"><svg class="ico" aria-hidden="true"><use href="/assets/icons.svg?v=1#i-layers"/></svg>Technology</a></li>
@@ -525,6 +526,7 @@
                         <div class="faq-answer"><div class="faq-answer-inner">
                             <p>For most homes a <strong>mini PC</strong> (for example with an Intel N100 processor and 16-32 GB of RAM) is perfectly fine. They are quiet, energy-saving (15-35 W) and compact – one fits on the shelf next to the router.</p>
                             <p>If you want more storage (for a film library, say), you can add a NAS or external hard drives. More detailed set-ups are on the <a href="/en/technology#hardware">Technology</a> page.</p>
+                            <p>To estimate how big a machine your own apps need, use the <a href="/en/sizing">Which machine do I need?</a> page.</p>
                         </div></div>
                     </div>