Merge pull request #52753 from munnerz/sample-controller

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

sample-controller: add example CRD controller

**What this PR does / why we need it**:

Adds a sample-controller example repository

fixes #52752

**Special notes for your reviewer**:

This is currently based on the sttts:sttts-codegen-scripts branch and should not be merged until that is (ref https://github.com/kubernetes/kubernetes/pull/52186)

**Release note**:

```
Add sample-controller repository
```

/cc @sttts @nikhita @colemickens

Kubernetes-commit: 9a7800f7d2efb88b397674672ac56f898826cf7c

vendor/github.com/go-openapi/swag/net.go

@@ -0,0 +1,24 @@
+package swag
+
+import (
+	"net"
+	"strconv"
+)
+
+// SplitHostPort splits a network address into a host and a port.
+// The port is -1 when there is no port to be found
+func SplitHostPort(addr string) (host string, port int, err error) {
+	h, p, err := net.SplitHostPort(addr)
+	if err != nil {
+		return "", -1, err
+	}
+	if p == "" {
+		return "", -1, &net.AddrError{Err: "missing port in address", Addr: addr}
+	}
+
+	pi, err := strconv.Atoi(p)
+	if err != nil {
+		return "", -1, err
+	}
+	return h, pi, nil
+}