* Bump Go to 1.17, refactor build/x86_64 Dockerfile to make better use of multi-stage
* Bump to 1.17 from 1.16
* Bump packr version, provide needed legacy env var
* Add apple silicon support, fix macos build chain
* Update unused travis ci
* Fix error string capitalization
Error strings often follow another string. Hence, they should not be
capitalized, unless referencing a name.
* Uncapitalize more error strings
While here, use %v on the error directly, which makes it easier to wrap
the error later with %w if need be.
* Uncapitalize more error strings
While here, rename Url to URL as a nitpick.