ObjectSpace :: serverOption - Server options
Server options are options, which are set on the server side. Since each client connection creates its own thread on the server side, each client connection will get its own server options, which are thread static.
Return value: Option value ( odaba::String & )
The option value contains the value set (or to be set) for an option.
In order to pass no option value, an empty string ( String () ) has to be passed.