Fixing cascade behaviour for package config. #5531
Merged
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Normal configs were cascading with array_replace_recursive(), which
merged recursive arrays nicely, however Package configs were using
array_merge(), which only merged the top-level arrays. This is
inconsistent across the configuration handling, and is confusing for
users trying to override specific package configuration.
It looks like this fix was proposed in Issue #757, but missed when the
Issue #1225 was proposed, considered a duplicate, and eventually
merged.