[enh] add subscribe link to rss results - closes #468

searx/templates/oscar/results.html

@@ -72,6 +72,8 @@
                     </form>
                     {% endfor %}
                     <div class="clearfix"></div>
+                    <br /><label><a href="{{ search_url() }}&amp;format=rss">{{ _('RSS subscription') }}</a></label>
+                    <div class="clearfix"></div>
                 </div>
             </div>
         </div><!-- /#sidebar_results -->