Update docker

Changes:

- https://github.com/docker-library/docker/commit/2285205: Merge pull request https://github.com/docker-library/docker/pull/174 from infosiftr/rootless
- https://github.com/docker-library/docker/commit/c01ffa4: Adjust bits per review
- https://github.com/docker-library/docker/commit/7db7ecc: Add experimental "rootless" dind variant

library/docker

@@ -1,4 +1,4 @@
-# this file is generated via https://github.com/docker-library/docker/blob/4975dca2dd357705c5613045348402ab664ccdf0/generate-stackbrew-library.sh
+# this file is generated via https://github.com/docker-library/docker/blob/7db7eccb7b7507b1a6ba3ef81c6f37b16149cc55/generate-stackbrew-library.sh
 
 Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
@@ -6,14 +6,19 @@ GitRepo: https://github.com/docker-library/docker.git
 
 Tags: 19.03.1, 19.03, 19, stable, test, latest
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 252695b88bf6c0e2914ca20b1f00a2ad0a2bfef3
+GitCommit: c01ffa41486f70c34f020c769bc5bddf106367ea
 Directory: 19.03
 
 Tags: 19.03.1-dind, 19.03-dind, 19-dind, stable-dind, test-dind, dind
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 306841553919fba3de31766c2ba44b9e2cc5e2ec
+GitCommit: c01ffa41486f70c34f020c769bc5bddf106367ea
 Directory: 19.03/dind
 
+Tags: 19.03.1-dind-rootless, 19.03-dind-rootless, 19-dind-rootless, stable-dind-rootless, test-dind-rootless, dind-rootless
+Architectures: amd64, arm32v6, arm32v7, arm64v8
+GitCommit: c01ffa41486f70c34f020c769bc5bddf106367ea
+Directory: 19.03/dind-rootless
+
 Tags: 19.03.1-git, 19.03-git, 19-git, stable-git, test-git, git
 Architectures: amd64, arm32v6, arm32v7, arm64v8
 GitCommit: 4975dca2dd357705c5613045348402ab664ccdf0
@@ -21,12 +26,12 @@ Directory: 19.03/git
 
 Tags: 18.09.8, 18.09, 18
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: cad4d26d9d84c3701e8fcfc922145b569f8dfc22
+GitCommit: c01ffa41486f70c34f020c769bc5bddf106367ea
 Directory: 18.09
 
 Tags: 18.09.8-dind, 18.09-dind, 18-dind
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 306841553919fba3de31766c2ba44b9e2cc5e2ec
+GitCommit: c01ffa41486f70c34f020c769bc5bddf106367ea
 Directory: 18.09/dind
 
 Tags: 18.09.8-git, 18.09-git, 18-git