Added back support for D7 and previous versions on make generate command
Move log message to later, more conservative spot.
Fix parenthesis
Use newer versions in D8 updatecode test

Also use --format=json for more precise assertions.
Now passing with webprofiler
Fix a notice in dl
Improve doc in pm engine types declaration.
Combine --update-backend help in one line.
Fix warning in ReleaseInfo engine.
Remove update-status specific cache.
Cache release xml by default.
Honour --cache in wget package-handler.
Merge pull request #992 from DavidHernandez/master

Fix regression in #903
Merge pull request #994 from jonhattan/release-info-xml-cache

Cache release xml and tarballs by default
More on #994. Document new default for wget package handler.
Follow-up to #994: cache tarballs as well.