This commit modifies config.json to allow for any proxies allowed in
build-args to be configured. These values will then be used
by default as build-args in docker build.
Signed-off-by: Dave Tucker <dt@docker.com>
Removes the build-args from the image history if they are in the
BuiltinAllowedBuildArgs map unless they are explicitly defined in an ARG
instruction.
Signed-off-by: Dave Tucker <dt@docker.com>