Remove unused middleware action
Directly capture guest release info via ssh + cat
Merge branch 'refactor-release_detection'
Detect guest architecture for installer
Rename transfer/http to transfer/open_uri

You know, renaming things for funsies.
Handle open-uri failures gracefully
Extract POSIX based installation detection into subclass
Correct typo in detect_installer/posix
Concatenate string content when reading remote files
Normalize variants of i386 arch when detecting
Merge branch 'handle-openuri-error'