mjg 7e57127b46 Add sysctl kern.proc.cwd
It returns only current working directory of given process which saves a lot of
overhead over kern.proc.filedesc if given proc has a lot of open fds.

Submitted by:	Tiwei Bie <btw mail.ustc.edu.cn> (slightly modified)
X-Additional:	JuniorJobs project
2014-11-06 08:12:34 +00:00
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