gavin e367b167d9 Implement the "-i" option to sysctl(8), to ignore failures while
retrieving individual OIDs.  This allows the same list of OIDs to be
passed to sysctl(8) across different systems where particular OIDs may not
exist, and still get as much information as possible from them.

PR:		bin/123644
Submitted by:	dhw
Approved by:	ed (mentor)
MFC after:	2 weeks
2010-01-31 19:33:25 +00:00
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