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- Initialize the disk device fd field in connection_new(). - Close the disk device after handing the connection over to a child worker. - Avoid re-opening a disk device for each connection from the same client, avoiding an fd leak. PR: 132845 Submitted by: Yoshihiro Ota <ota@j.email.ne.jp> MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D26168