Matches https://github.com/ilyagr/pijul-clone as of now, might become out of sync

use native external subcommand support instead of hand-rolled one

Created by  danieleades  on November 30, 2020
SNZ3OAMCPUGFYON5SZHQQQK46ZZMVMJECJYEUCMG657UVLY2PNBQC
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