cli_parser: allow hiding from man page.
cli_parser: allow hiding from man page.

Homebrew/brew,nandub/brew,nandub/brew,reitermarkus/brew,konqui/brew,reitermarkus/brew,konqui/brew,Homebrew/brew,vitorgalvao/brew,EricFromCanada/brew,sjackman/homebrew,MikeMcQuaid/brew,sjackman/homebrew,mahori/brew,nandub/brew,reitermarkus/brew,claui/brew,claui/brew,claui/brew,mahori/brew,vitorgalvao/brew,Homebrew/brew,JCount/brew,claui/brew,reitermarkus/brew,MikeMcQuaid/brew,konqui/brew,EricFromCanada/brew,JCount/brew,JCount/brew,sjackman/homebrew,MikeMcQuaid/brew,vitorgalvao/brew,konqui/brew,Homebrew/brew,MikeMcQuaid/brew,EricFromCanada/brew,vitorgalvao/brew,sjackman/homebrew,JCount/brew,EricFromCanada/brew,mahori/brew,mahori/brew,nandub/brew