FreeBSD_STABLE_11-arm64 - Build #188 - Fixed

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FreeBSD_STABLE_11-arm64 - Build #188 - Fixed:

Build information: https://jenkins.FreeBSD.org/job/FreeBSD_STABLE_11-arm64/188/
Full change log: https://jenkins.FreeBSD.org/job/FreeBSD_STABLE_11-arm64/188/changes
Full build log: https://jenkins.FreeBSD.org/job/FreeBSD_STABLE_11-arm64/188/console

Change summaries:

306633 by rmacklem:
MFC: r304059
Update the man page to descibe the "-d" option added by r304058.

This is a content change.

306632 by rmacklem:
MFC: r304058, r304066, r304194
Update nfsstat.c to use the new kernel nfsstat structure and
add the new "-d" flag from D1626.
The man page will be updated in a subsequent commit.