Set TRUE if automatic Y-blaze correction is to be used.
This correction proceeds by examining the scrunched orders and re-scaling them so that the extremes of adjacent orders match up.
This should only be used when no flux calibration is available and there is a real need for it. It requires that the blaze fit be scrunched before being applied, and therefore necessitates a blaze-fit followed by a scrunch. The blaze correction is only applied to scrunched (and merged) orders in this case.
When TUNE_YBLAZE=FALSE, the blaze fit is applied to the extracted orders directly and these may be later scrunched.
INITIAL SUGGESTED VALUE: NO.
Martin Clayton