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* update auto connect use sys work. * add fast connect. * update wlan cmd, support scan result report user-level callback. Co-authored-by: zetingxu <zetingxu@bestechnic.com> Co-authored-by: liu2guang <liuguang@rt-thread.com> Co-authored-by: guodi <guodi@rt-thread.com> Co-authored-by: geniusgogo <xpxyr@sina.com>