The link is leading to group.8, let it lead to group.5
Index: faq/faq10.html
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RCS file: /cvs/www/faq/faq10.html,v
retrieving revision 1.273
diff -u -p -r1.273 faq10.html
--- faq/faq10.html 13 Oct 2017 23:21:43 -0000 1.273
+++ faq/faq10.html 20 Nov 2017 21:46:41 -0000
@@ -650,7 +650,7 @@ The most common use cases include:
</pre></blockquote>
For details on selective group inclusion, see
- <a href="https://man.openbsd.org/group">group(5)</a>.
+ <a href="https://man.openbsd.org/group.5">group(5)</a>.
</ul>
<p>