vm: restore sigaltstack setup on unix #ifdef __OpenBSD__ is different from #ifndef __OpenBSD
vm: restore sigaltstack setup on unix
#ifdef __OpenBSD__ is different from #ifndef __OpenBSD

slavapestov/factor,nicolas-p/factor,tgunr/factor,dch/factor,AlexIljin/factor,tgunr/factor,sarvex/factor-lang,slavapestov/factor,bjourne/factor,mrjbq7/factor,nicolas-p/factor,AlexIljin/factor,mrjbq7/factor,dch/factor,slavapestov/factor,AlexIljin/factor,dch/factor,bpollack/factor,dch/factor,mrjbq7/factor,slavapestov/factor,bjourne/factor,sarvex/factor-lang,nicolas-p/factor,sarvex/factor-lang,sarvex/factor-lang,mrjbq7/factor,slavapestov/factor,tgunr/factor,nicolas-p/factor,factor/factor,factor/factor,AlexIljin/factor,sarvex/factor-lang,mrjbq7/factor,tgunr/factor,bjourne/factor,bpollack/factor,nicolas-p/factor,slavapestov/factor,nicolas-p/factor,factor/factor,AlexIljin/factor,factor/factor,bpollack/factor,bpollack/factor,bpollack/factor,sarvex/factor-lang,mrjbq7/factor,AlexIljin/factor,nicolas-p/factor,slavapestov/factor,sarvex/factor-lang,tgunr/factor,bjourne/factor,factor/factor,bjourne/factor,dch/factor,factor/factor,bjourne/factor,dch/factor,tgunr/factor,bjourne/factor,bpollack/factor,bpollack/factor,AlexIljin/factor