add [un]set-os-env tests
add [un]set-os-env tests

tgunr/factor,slavapestov/factor,mrjbq7/factor,erg/factor,ehird/factor,erg/factor,sarvex/factor-lang,factor/factor,tgunr/factor,erg/factor,kingcons/factor,AlexIljin/factor,jwmerrill/factor,dch/factor,AlexIljin/factor,bjourne/factor,kingcons/factor,ceninan/factor,erg/factor,dharmatech/factor,seckar/factor,cataska/factor,ceninan/factor,nicolas-p/factor,dch/factor,nicolas-p/factor,tgunr/factor,ceninan/factor,cataska/factor,dch/factor,dch/factor,AlexIljin/factor,mcandre/factor,bpollack/factor,littledan/Factor,mcandre/factor,nicolas-p/factor,tgunr/factor,ehird/factor,AlexIljin/factor,mrjbq7/factor,slavapestov/factor,factor/factor,sarvex/factor-lang,dharmatech/factor,sarvex/factor-lang,cataska/factor,bjourne/factor,dch/factor,factor/factor,bjourne/factor,mcandre/factor,factor/factor,erg/factor,mecon/factor,cataska/factor,bpollack/factor,nicolas-p/factor,sarvex/factor-lang,dharmatech/factor,mecon/factor,littledan/Factor,mecon/factor,tgunr/factor,slavapestov/factor,mcandre/factor,mecon/factor,tgunr/factor,mrjbq7/factor,AlexIljin/factor,bjourne/factor,mecon/factor,mecon/factor,mecon/factor,bjourne/factor,slavapestov/factor,mrjbq7/factor,bpollack/factor,erg/factor,slavapestov/factor,kingcons/factor,jwmerrill/factor,factor/factor,bpollack/factor,ehird/factor,nicolas-p/factor,Keyholder/factor,seckar/factor,factor/factor,nicolas-p/factor,sarvex/factor-lang,littledan/Factor,mrjbq7/factor,slavapestov/factor,kingcons/factor,AlexIljin/factor,sarvex/factor-lang,mrjbq7/factor,sarvex/factor-lang,erg/factor,bjourne/factor,mcandre/factor,jwmerrill/factor,dch/factor,bpollack/factor,littledan/Factor,bpollack/factor,mcandre/factor,seckar/factor,slavapestov/factor,Keyholder/factor,bjourne/factor,bpollack/factor,ceninan/factor,nicolas-p/factor,mcandre/factor,AlexIljin/factor,Keyholder/factor