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shells/44bsd-csh: remove sbrk use
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Authored by brooks on Dec 8 2023, 11:22 PM.
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Summary

The allocator wrappers call sbrk(0) to track heap usage. With modern
malloc implementations this is of little value and sbrk is deprecated so
remove this functionality, but continue to provide a stub implemenation
of the alloc command.

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Build 51765: arc lint + arc unit

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brooks created this revision.

Compiled and minimally smoke tested on an amd64 world without sbrk support.

why is this port still a thing