calendar.unix: rename timespec>seconds to timespec>duration to be consistent with timeval>duration
calendar.unix: rename timespec>seconds to timespec>duration to be consistent with timeval>duration

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