Include plugins in `docker --badopt` help output#1850

Merged

silvin-lubecki merged 4 commits intodocker:masterfrom

ijc:include-plugins-in-badopt-help

May 13, 2019

Commits on Apr 26, 2019

Move subtests of TestGlobalHelp into actual subtests
Ian Campbell
committed
Hide experimental builtin commands in help output on unknown flag.
Ian Campbell
committed
Include CLI plugins in help output on unknown flag.
Ian Campbell
committed
Use command.Cli instead of command.DockerCli
Ian Campbell
committed