update vendor

Signed-off-by: Jess Frazelle <acidburn@microsoft.com>

vendor/github.com/docker/cli/scripts/docs/generate-authors.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -e
+
+cd "$(dirname "$(readlink -f "${BASH_SOURCE[*]}")")/../.."
+
+# see also ".mailmap" for how email addresses and names are deduplicated
+
+{
+	cat <<-'EOH'
+	# This file lists all individuals having contributed content to the repository.
+	# For how it is generated, see `scripts/docs/generate-authors.sh`.
+	EOH
+	echo
+	git log --format='%aN <%aE>' | LC_ALL=C.UTF-8 sort -uf
+} > AUTHORS

vendor/github.com/docker/cli/scripts/docs/generate-man.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+# Generate man pages for docker/cli
+set -eu -o pipefail
+
+mkdir -p ./man/man1
+
+go install ./vendor/github.com/cpuguy83/go-md2man
+
+# Generate man pages from cobra commands
+go build -o /tmp/gen-manpages github.com/docker/cli/man
+/tmp/gen-manpages --root "$(pwd)" --target "$(pwd)/man/man1"
+
+# Generate legacy pages from markdown
+./man/md2man-all.sh -q

vendor/github.com/docker/cli/scripts/docs/generate-yaml.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+# Generate yaml for docker/cli reference docs
+set -eu -o pipefail
+
+mkdir -p docs/yaml/gen
+
+go build -o build/yaml-docs-generator github.com/docker/cli/docs/yaml
+build/yaml-docs-generator --root "$(pwd)" --target "$(pwd)/docs/yaml/gen"