Error code resolution is powered by string matching. Not the greatest
thing in the world and I hope no one is proud of this code, but it
works. However, because a map is used, the iteration order of the map is
random, such that if an error matches two of the snippets, it may return
a different error code depending on the seed of the hashmap. This change
converts it to use a slice instead.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
Upstream-commit: 3484e02590117d175d9c1ab24c583390b4e94a55
Component: engine