Spamassassin header based on _STARS(*)_

[tipichris]

Feature request
Could a spam header be added based on the STARS(*) template tag?

I find these headers useful for using Sieve to filter suspected spam into different folders depending on level. For example, a folder for 5 or 6 will pick up most false positives and can be checked regularly, whilst a folder for 7 or more is almost certainly spam