PR#1124: tooltip for search field

Merges #1124
https://pagure.io/koji/pull-request/1124

Fixes: #1122
https://pagure.io/koji/issue/1122
Better help for search field in webui

www/kojiweb/includes/header.chtml

@@ -69,7 +69,7 @@ $localnav
               <option value="win">Windows Artifacts</option>
               #end if
             </select>
-            <input type="text" name="terms"/>
+            <input type="text" name="terms" title="You can use glob expressions here (e.g. 'bash-*')"/>
             <input type="submit" value="Search"/>
           </form>
         </div><!-- end header -->