bootstrap.image: disable auto-use.  Fixes #263.
bootstrap.image: disable auto-use.  Fixes #263.

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