Francis Lavoie e6c29ce081
reverseproxy: Incorporate latest proxy changes from stdlib (#4266)
I went through the commits that touched stdlib's `reverseproxy.go` file, and copied over all the changes that are to code that was copied into Caddy.

The commits I pulled changes from:

- 2cc347382f
- a5cea062b3
- ecdbffd4ec
- 21898524f6
-ca3c0df1f8
- 9c017ff30d

This may also fix https://github.com/caddyserver/caddy/issues/4247 because of the change to `copyResponse` to set `mlw.flushPending = true` right away.
2021-08-12 10:48:24 -06:00
..