replaced docker/docker with moby/moby (#2879)

* replaced docker/docker with moby/moby

* fixed incorrect name changes in release notes

* fixed mentions of moby/moby in code

docs/index.md

@@ -34,7 +34,7 @@ into [Docker Trusted Registry](/datacenter/dtr/2.1/guides/index.md).
 
 The Registry is compatible with Docker engine **version 1.6.0 or higher**. If
 you really need to work with older Docker versions, you should look into the
-[old python registry](https://github.com/docker/docker-registry).
+[old python registry](https://github.com/moby/moby-registry).
 
 ## TL;DR
 

docs/recipes/nginx.md

@@ -120,7 +120,7 @@ http {
     # disable any limits to avoid HTTP 413 for large image uploads
     client_max_body_size 0;
 
-    # required to avoid HTTP 411: see Issue #1486 (https://github.com/docker/docker/issues/1486)
+    # required to avoid HTTP 411: see Issue #1486 (https://github.com/moby/moby/issues/1486)
     chunked_transfer_encoding on;
 
     location /v2/ {