a7c124c2d0
`HOMEBREW_FORCE_BREW_WRAPPER` can be used as a security/compliance feature, but allowing it to be disabled by setting `HOMEBREW_NO_FORCE_BREW_WRAPPER` leaves a pretty large hole in it that allows it to be sidestepped. Let's fix that by actually checking the path of the process that called `brew`, and the verify that that path matches the configured value of `HOMEBREW_NO_FORCE_BREW_WRAPPER`.