All supported versions of Go can download golang.org/dl/... commands
via the new go install path@latest syntax. Update their documentation
accordingly.
Also update the golang.org/dl/internal/genv generator template for
future commands that will be added when new Go releases are made.
Fixesgolang/go#48080.
Change-Id: I0abf80e944322f3e30f7eb1b03b5d8d3be25554d
Reviewed-on: https://go-review.googlesource.com/c/dl/+/346091
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Dmitri Shuralyov
Katie Hockman