What's up with the "Meaning of MIT license"? (5 years old post recently migrated from SO to Programmers meta, then to main)

Question

What's up with the Meaning of MIT license?

This five years old post was recently migrated from SO to Programmers. Not that I complain, but regular migrations like that are blocked by system (see Disable migration for questions older than 60 days). What makes this question special to overrule this limitation?

I briefly checked recent posts at MSO and MSE and found nothing about this migration.

---

Question revision history at SO shows couple funny changes made recently:

    Post Deleted by Tim Post♦   occurred 5 hours ago
    Post Locked by Community♦   occurred 5 hours ago
    Post Migrated Away to programmers.stackexchange.com by Tim Post♦
        occurred 5 hours ago
    Post Closed as "off-topic" by Tim Post♦     occurred 5 hours ago
    Post Undeleted by Tim Post♦     occurred 5 hours ago
    Post Reopened by Tim Post♦  occurred 5 hours ago
    Migration Rejected  occurred 5 hours ago
    Post Unlocked by Community♦     occurred 5 hours ago
    Post Deleted by Shog9♦  occurred 19 hours ago
    Post Locked by Community♦   occurred 19 hours ago
    Post Migrated Away to meta.programmers.stackexchange.com by Shog9♦
        occurred 19 hours ago
    Post Closed as "off topic" by Wouter J, egrunin, msmucker0527, Mario, Linger
        occurred Mar 6 '13 at 20:37

^{FWIW it looks like a duplicate of MIT vs. BSD vs. Dual License to me.}