Hide footer links to About and Privacy pages when single-user

Previously, these links showed up on user backend pages on a single-user
instance, despite them not working / only being applicable on multi-user
instances.

templates/user/include/footer.tmpl

@@ -8,10 +8,10 @@
 		<hr />
 		<nav>
 			<a class="home" href="/">{{.SiteName}}</a>
-			<a href="/about">about</a>
+			{{if not .SingleUser}}<a href="/about">about</a>{{end}}
 			{{if and (not .SingleUser) .LocalTimeline}}<a href="/read">reader</a>{{end}}
 			<a href="https://writefreely.org/guide/{{.OfficialVersion}}" target="guide">writer's guide</a>
-			<a href="/privacy">privacy</a>
+			{{if not .SingleUser}}<a href="/privacy">privacy</a>{{end}}
 			<a href="https://writefreely.org">writefreely {{.Version}}</a>
 		</nav>
 	</footer>