experiment to move much of Rule 17 text into an FAQ

In order simplify the write-up of the actual Rule 17
into a new FAQ 1.8.  The somewhat shorted Rule 17 text
now refers to checks performed by tools, encourages
their use, discourages their misuse (overriding limits),
and is easier to read: we think.

next/guidelines.html

@@ -1115,7 +1115,7 @@ do the same like:
 </p>
 <pre><code>    tar --format=v7 -cJf foo.txz directory</code></pre>
 <p class="leftbar">
-See <a href="rules.html#rule17">Rule 17</a> and in particular the part about the <a href="rules.html#max-files">maximum
+See <a href="rules.html#rule17">Rule 17</a> and in particular the part about the <a href="../faq.html#max-files">maximum
 number of files</a>. If you do not follow these points, you
 are at a great risk of violating <a href="rules.html#rule17">Rule 17</a>!
 </p>