shixiong/okd @ 756ce62c438397da24e941ab50df87ded1dfc67c

Devan Goodwin b89c835e32 Improvements for Docker 1.10+ upgrade image nuking.		%!s(int64=8) %!d(string=hai) anos
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nuke_images.sh	b89c835e32 Improvements for Docker 1.10+ upgrade image nuking.	%!s(int64=8) %!d(string=hai) anos
pre-upgrade-check	018fc6ad15 Clarify the preflight port check output	%!s(int64=9) %!d(string=hai) anos
rpm_versions.sh	7ebdbd1e74 Fix dnf variant of rpm_versions.sh	%!s(int64=9) %!d(string=hai) anos