net/http: fix the old url about deflate
net/http: fix the old url about deflate

Change-Id: Iaa1468296fbc98389165a152cf8b591216c22489
Reviewed-on: https://go-review.googlesource.com/c/155217
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

josharian/go,akutz/go,josharian/go,josharian/go,nawawi/go,cloudflare/go,nawawi/go,golang/go,CAFxX/go,nawawi/go,cloudflare/go,CAFxX/go,nawawi/go,CAFxX/go,josharian/go,josharian/go,akutz/go,golang/go,cloudflare/go,nawawi/go,akutz/go,nawawi/go,golang/go,nawawi/go,golang/go,nawawi/go,golang/go,josharian/go,golang/go,akutz/go,CAFxX/go,cloudflare/go,akutz/go,golang/go,akutz/go,cloudflare/go,CAFxX/go,cloudflare/go,golang/go,akutz/go,josharian/go,cloudflare/go,CAFxX/go,CAFxX/go,akutz/go,cloudflare/go,CAFxX/go,josharian/go