Add (currently unused) function to delete all contacts + update changelog

CHANGELOG

@@ -4,7 +4,9 @@ CHANGELOG RoundCube Webmail
 2008/02/20 (thomasb)
 ----------
 - Localize folder name in page title (#1484785)
+- Fix code using wrong variable name (#1484018)
 - Allow to send mail with BCC recipients only
+- Remove MDN headers before saving in sent folder
 
 2008/02/12 (estadtherr)
 ----------

program/include/rcube_contacts.inc

@@ -386,6 +386,19 @@ class rcube_contacts
 
     return $this->db->affected_rows();
   }
+  
+  
+  /**
+   * Remove all records from the database
+   */
+  function delete_all()
+  {
+    if (is_array($ids))
+      $ids = join(',', $ids);
+
+    $this->db->query("DELETE FROM {$this->db_name} WHERE  user_id=?", $this->user_id);
+    return $this->db->affected_rows();
+  }
 
 }