Fixed various issues related to unicode and CGI variables (assuming that CGI variables are utf-8 encoded, and sometime percent encoded).
Delayed computation of `value' and `name' from WSF_STRING.
Fixed computation of REQUEST_URI when the server does not provide it (this is rare, but possible).
   compute it as SERVER_NAME + encoded-PATH_INFO + {? + QUERY_STRING}
Various changes related to new WSF_DEBUG_INFORMATION and WSF_DEBUG_HANDLER.