kevans 385e49459a cron(8): convert vfork() usage to fork()
vfork() is error-prone, and the usage here definitely grew to not be
clearly OK given vfork-semantics; e.g. setusercontext(3) within the child.

Rip out vfork() and the rest of the references to it. fork is heavier, but
it's unclear that the difference will be all that obvious.

Reported by:	Andrew Gierth and sigsys@gmail.com
2020-02-10 02:40:23 +00:00
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