uhttpd: various fixes

- avoid closing descriptors before removing them from uloop (#11755, #11830)
    - do not auto-initialize ubus if no prefix is set (#11832)
    - remove extraneous client context pointer from cgi and lua states
    - code cleanups and debug message changes

SVN-Revision: 32651

package/uhttpd/src/uhttpd-cgi.h

@@ -28,9 +28,6 @@
 
 
 struct uh_cgi_state {
-	int rfd;
-	int wfd;
-	struct client *cl;
 	char httpbuf[UH_LIMIT_MSGHEAD];
 	int content_length;
 	bool header_sent;