class CGI::Session
  # If a key is specified, deletes that key from the session pseudo-hash.  Otherwise,
  # performs the classic behavior of deleting the session from storage.
  def delete(key=nil)
    if key
      @data ||= @dbman.restore
      @data.delete(key)
    else
      @dbman.delete
      @dbprot.clear
    end
  end
end