Pass environment variables of proxy to tox
When a development environment is under a proxy, tox fails even if env
variables are set, this patch will fix this problem.
@@ -112,7 +112,7 @@ commands =
# Provide an environment for system packagers that dont want anything from pip
# Any extra deps needed for this env can be passed by setting TOX_EXTRA_DEPS
sitepackages = True
-passenv = TOX_EXTRA_DEPS
+passenv = TOX_EXTRA_DEPS http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
# Sets deps to an empty list so nothing is installed from pip
deps =
commands =
