better comments by author

Removes some restrictions previously added. Or else we would need a 'userComments' privilege. But that would not make too much sense, since we already work with the lowest group privilege here.
This still is not ready yet, I presume. It needs more finetuning like answer to comments, etc.
Please help testing.

References #385

include/admin/comments.inc.php

@@ -4,17 +4,6 @@ if (IN_serendipity !== true) {
     die ("Don't hack!");
 }
 
-$trusted = false;
-
-if ($serendipity['serendipityUserlevel'] == 0 && $serendipity['GET']['authorid'] == $serendipity['authorid']) {
-    $serendipity['POST'] = $serendipity['GET'];
-    $trusted = true;
-}
-
-if (!serendipity_checkPermission('adminComments') && !$trusted) {
-    return;
-}
-
 $data = array();
 
 $commentsPerPage = (int)(!empty($serendipity['GET']['filter']['perpage']) ? $serendipity['GET']['filter']['perpage'] : 10);

serendipity_admin.php

@@ -174,7 +174,7 @@ if (!$use_installer && $is_logged_in) {
             break;
 
         case 'comments':
-            // perms are checked inside
+            // perms are checked by author
             include S9Y_INCLUDE_PATH . 'include/admin/comments.inc.php';
             $admin_section = COMMENTS;
             break;

templates/2k11/admin/index.tpl

@@ -126,20 +126,15 @@
                     </ul>
                 </li>
                 {/if}
-                {if 'adminComments'|checkPermission}
 
                 <li><h3>{$CONST.MENU_ACTIVITY}</h3>
                     <ul>
-                    {if 'adminComments'|checkPermission}
-
                         <li><a href="serendipity_admin.php?serendipity[adminModule]=comments">{$CONST.COMMENTS}</a></li>
-                    {/if}
-                    {if $admin_vars.no_create !== true}
+                    {if 'adminPlugins'|checkPermission AND $admin_vars.no_create !== true}
                         {serendipity_hookPlugin hook="backend_sidebar_admin_appearance" hookAll="true"}
                     {/if}
                     </ul>
                 </li>
-                {/if}
                 {if 'adminUsersGroups'|checkPermission OR 'adminImport'|checkPermission OR 'siteConfiguration'|checkPermission OR 'blogConfiguration'|checkPermission OR 'adminUsers'|checkPermission OR 'adminTemplates'|checkPermission OR 'adminPlugins'|checkPermission}
 
                 <li><h3>{$CONST.MENU_SETTINGS}</h3>