sftp: specify HostKeyCallback in ClientConfig
sftp: specify HostKeyCallback in ClientConfig

B4dM4n/rclone,yonjah/rclone,ncw/rclone,ncw/rclone,seuffert/rclone,seuffert/rclone,olihey/rclone,olihey/rclone,olihey/rclone,olihey/rclone,B4dM4n/rclone,yonjah/rclone,B4dM4n/rclone,seuffert/rclone,ncw/rclone,yonjah/rclone,B4dM4n/rclone,yonjah/rclone,seuffert/rclone,ncw/rclone