net/http: make DefaultTransport docs about HTTP proxy consistent

The changes improve the documentation for DefaultTransport, making
the style with how the HTTP proxy environment variables are being
referred to, consistent with the rest of the project's
documentation.

Also mention HTTPS_PROXY environment variables, as suggested in #32649.

Change-Id: I4e6b49881d7b30b5a0d4699531fa7c2929fc49f7
GitHub-Last-Rev: 2fc751937be685aa45acf43cf37b8ba2da124e4e
GitHub-Pull-Request: golang/go#54996
Reviewed-on: https://go-review.googlesource.com/c/go/+/430135
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Jenny Rakoczy <jenny@golang.org>
Run-TryBot: Damien Neil <dneil@google.com>
Reviewed-by: Jenny Rakoczy <jenny@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>

diff --git a/src/net/http/transport.go b/src/net/http/transport.go
index 1854daba8a71a8901866f1dcd7728e229e704706..b3fc08139c76abb4a836774cefc10c2bd28c56fe 100644 (file)
--- a/src/net/http/transport.go
+++ b/src/net/http/transport.go
@@ -38,8 +38,8 @@ import (
 // DefaultTransport is the default implementation of Transport and is
 // used by DefaultClient. It establishes network connections as needed
 // and caches them for reuse by subsequent calls. It uses HTTP proxies
-// as directed by the $HTTP_PROXY and $NO_PROXY (or $http_proxy and
-// $no_proxy) environment variables.
+// as directed by the environment variables HTTP_PROXY, HTTPS_PROXY
+// and NO_PROXY (or the lowercase versions thereof).
 var DefaultTransport RoundTripper = &Transport{
        Proxy: ProxyFromEnvironment,
        DialContext: defaultTransportDialContext(&net.Dialer{