define rights around how to silence, sandbox, and delete a user

classes/User.php

@@ -720,10 +720,14 @@ class User extends Memcached_DataObject
             switch ($right)
             {
             case Right::DELETEOTHERSNOTICE:
+            case Right::SANDBOXUSER:
+            case Right::SILENCEUSER:
+            case Right::DELETEUSER:
                 $result = $this->hasRole(User_role::MODERATOR);
                 break;
             case Right::CONFIGURESITE:
                 $result = $this->hasRole(User_role::ADMINISTRATOR);
+                break;
             default:
                 $result = false;
                 break;
@@ -774,4 +778,14 @@ class User extends Memcached_DataObject
         $block->delete();
         // XXX delete group block? Reset blocker?
     }
+
+    function isSandboxed()
+    {
+        return $this->hasRole(User_role::SANDBOXED);
+    }
+
+    function isSilenced()
+    {
+        return $this->hasRole(User_role::SILENCED);
+    }
 }

classes/User_role.php

@@ -48,4 +48,6 @@ class User_role extends Memcached_DataObject
 
     const MODERATOR     = 'moderator';
     const ADMINISTRATOR = 'administrator';
+    const SANDBOXED     = 'sandboxed';
+    const SILENCED      = 'silenced';
 }

lib/right.php

@@ -47,5 +47,8 @@ class Right
 {
     const DELETEOTHERSNOTICE = 'deleteothersnotice';
     const CONFIGURESITE      = 'configuresite';
+    const DELETEUSER         = 'deleteuser';
+    const SILENCEUSER        = 'silenceuser';
+    const SANDBOXUSER        = 'sandboxuser';
 }