Merge branch 'v4-dev' of https://github.com/twbs/bootstrap into v4-dev

docs/_includes/footer.html

@@ -3,8 +3,8 @@
     <ul class="bd-footer-links">
       <li><a href="{{ site.repo }}">GitHub</a></li>
       <li><a href="https://twitter.com/getbootstrap">Twitter</a></li>
-      <li><a href="../getting-started/#examples">Examples</a></li>
-      <li><a href="../about/">About</a></li>
+      <li><a href="{{ site.baseurl }}/examples/">Examples</a></li>
+      <li><a href="{{ site.baseurl }}/about/history/">About</a></li>
     </ul>
     <p>Designed and built with all the love in the world by <a href="https://twitter.com/mdo" target="_blank">@mdo</a> and <a href="https://twitter.com/fat" target="_blank">@fat</a>. Maintained by the <a href="https://github.com/orgs/twbs/people">core team</a> with the help of <a href="https://github.com/twbs/bootstrap/graphs/contributors">our contributors</a>.</p>
     <p>Currently v{{ site.current_version }}. Code licensed <a rel="license" href="https://github.com/twbs/bootstrap/blob/master/LICENSE" target="_blank">MIT</a>, docs <a rel="license" href="https://creativecommons.org/licenses/by/3.0/" target="_blank">CC BY 3.0</a>.</p>

docs/components/dropdowns.md

@@ -4,7 +4,7 @@ title: Dropdowns
 group: components
 ---
 
-Dropdowns are toggleable, contextual overlays for displaying lists of links and more. They're made interactive with the included Bootstrap dropdown JavaScript plugin.
+Dropdowns are toggleable, contextual overlays for displaying lists of links and more. They're made interactive with the included Bootstrap dropdown JavaScript plugin. They're toggled by clicking, not by hovering; this is [an intentional design decision.](http://markdotto.com/2012/02/27/bootstrap-explained-dropdowns/)
 
 ## Contents