hack/ci/marker: update marker (#2146)

Update marker to v0.8.0. As before, this was built in a CentOS 7
VM, which allows it to run in both Travis and API-CI, and then
was stripped, then compressed by UPX.

Marker v0.8.0 fixes the `_` issue that was previously causing
problems in some PRs that changed markdown files, adds support
for Github style checklists using `[]`, and adds a --exclude flag.

The other changes in the PR are changing the Makefile to run marker
on the entire project tree and fixes a couple of new broken
references/URLs found by marker.

Author: AlexNPavel

CHANGELOG.md

@@ -21,7 +21,7 @@
 ### Changed
 
 - **Breaking change:** Changed required Go version from `1.12` to `1.13`. This change applies to the SDK project itself and Go projects scaffolded by the SDK. Projects that import this version of the SDK require Go 1.13 to compile. ([#1949](https://github.com/operator-framework/operator-sdk/pull/1949))
-  
+
 ### Deprecated
 - Upgrade Kubernetes version from `kubernetes-1.14.1` to `kubernetes-1.15.4`. ([#2083](https://github.com/operator-framework/operator-sdk/pull/2083))
 - Upgrade Helm version from `v2.14.1` to `v2.15.0`. ([#2083](https://github.com/operator-framework/operator-sdk/pull/2083))
@@ -88,7 +88,7 @@
       err = r.client.List(context.TODO(), listOps, podList)
       // New
       listOpts := []client.ListOption{
-        client.InNamespace("namespace"),        
+        client.InNamespace("namespace"),
       }
       err = r.client.List(context.TODO(), podList, listOpts...)
       ```
@@ -124,7 +124,7 @@
 
 ### Changed
 
-- **Breaking Change:** New configuration format for the `operator-sdk scorecard` using config files. See [`doc/test-framework/scorecard`](doc/test-framework/scorecard) for more info ([#1641](https://github.com/operator-framework/operator-sdk/pull/1641))
+- **Breaking Change:** New configuration format for the `operator-sdk scorecard` using config files. See [`doc/test-framework/scorecard`](doc/test-framework/scorecard.md) for more info ([#1641](https://github.com/operator-framework/operator-sdk/pull/1641))
 - **Breaking change:** CSV config field `role-path` is now `role-paths` and takes a list of strings. Users can now specify multiple `Role` and `ClusterRole` manifests using `role-paths`. ([#1704](https://github.com/operator-framework/operator-sdk/pull/1704))
 - Make `ready` package idempotent. Now, a user can call `Set()` or `Unset()` to set the operator's readiness without knowing the current state. ([#1761](https://github.com/operator-framework/operator-sdk/pull/1761))
 
@@ -350,7 +350,7 @@
 ### Changed
 
 - The SDK now uses logr as the default logger to unify the logging output with the controller-runtime logs. Users can still use a logger of their own choice. See the [logging doc](https://github.com/operator-framework/operator-sdk/blob/master/doc/user/logging.md) on how the SDK initializes and uses logr.
-- Ansible Operator CR status better aligns with [conventions](https://github.com/kubernetes/community/blob/master/contributors/devel/api-conventions.md#typical-status-properties). ([#639](https://github.com/operator-framework/operator-sdk/pull/639))
+- Ansible Operator CR status better aligns with [conventions](https://github.com/kubernetes/community/blob/master/contributors/devel/sig-architecture/api-conventions.md#typical-status-properties). ([#639](https://github.com/operator-framework/operator-sdk/pull/639))
 
 ### Added
 

Makefile

@@ -107,7 +107,7 @@ build/%.asc:
 test: test-unit ## Run the tests
 
 test-markdown test/markdown:
-	./hack/ci/marker --root=doc
+	./hack/ci/marker
 
 test-sanity test/sanity: tidy
 	./hack/tests/sanity-check.sh

doc/sdk-cli-reference.md

@@ -335,7 +335,7 @@ Adds a new controller under `pkg/controller/<kind>/...` that, by default, reconc
 
 * `--api-version` string - CRD APIVersion in the format `$GROUP_NAME/$VERSION` (e.g app.example.com/v1alpha1)
 * `--kind` string - CRD Kind. (e.g AppService)
-* `--custom-api-import` string - External Kubernetes resource import path of the form "host.com/repo/path[=import_identifier]". import_identifier is optional
+* `--custom-api-import` string - External Kubernetes resource import path of the form "host.com/repo/path\[=import_identifier\]". import_identifier is optional
 
 #### Example