Size the alternate signal stack from the kernel minimum, and stop discarding the caller's (#495) - #496

Size the alternate signal stack from the kernel minimum, and stop discarding the caller's (#495)#496

mborland merged 5 commits into

boostorg:developboostorg/test:developfrom

jamescowens:fix/alt-stack-sizingjamescowens/test:fix/alt-stack-sizingCopy head branch name to clipboard