CPU bug hardening added to DragonFly

Matthew Dillon’s added some patches to DragonFly related to securing floating point state, following similar work in OpenBSD.  There isn’t a reported catchy-name issue to match it, like Spectre/Meltdown – yet.

(If anyone has a good link to the similar OpenBSD commits, please share; I did not find them on a cursory search.)

Update: the fix is now in 5.2 and an update is recommended.

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