truckman 60d9e55a8a Return EPERM from lookup() if cn_nameiop is DELETE or RENAME and
the last component of the path name is "..".  This keeps VOP_LOOKUP()
from locking vnodes in reverse order.

Tested by:	Denis Shaposhnikov <dsh AT vlink DOT ru>
MFC after:	3 days
2006-01-21 19:57:56 +00:00
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