fully write new config file before moving to target location (fixes #1287)
fully write new config file before moving to target location (fixes #1287)

* fully write new config file before moving to target location (fixes #1287)
* do not fail if there is no previous config; print temporary config path on failure

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