Add c4d machines to validMachineTypes (#434)

Author: mlaver

rules/utils.go

@@ -128,6 +128,56 @@ var validMachineTypes = map[string]bool{
 	"c4-highmem-48":   true,
 	"c4-highmem-96":   true,
 	"c4-highmem-192":  true,
+	// C4D
+	"c4d-standard-2":         true,
+	"c4d-standard-4":         true,
+	"c4d-standard-8":         true,
+	"c4d-standard-16":        true,
+	"c4d-standard-32":        true,
+	"c4d-standard-48":        true,
+	"c4d-standard-64":        true,
+	"c4d-standard-96":        true,
+	"c4d-standard-192":       true,
+	"c4d-standard-384":       true,
+	"c4d-standard-384-metal": true,
+	"c4d-standard-8-lssd":    true,
+	"c4d-standard-16-lssd":   true,
+	"c4d-standard-32-lssd":   true,
+	"c4d-standard-48-lssd":   true,
+	"c4d-standard-64-lssd":   true,
+	"c4d-standard-96-lssd":   true,
+	"c4d-standard-192-lssd":  true,
+	"c4d-standard-384-lssd":  true,
+	"c4d-highcpu-2":          true,
+	"c4d-highcpu-4":          true,
+	"c4d-highcpu-8":          true,
+	"c4d-highcpu-16":         true,
+	"c4d-highcpu-32":         true,
+	"c4d-highcpu-48":         true,
+	"c4d-highcpu-64":         true,
+	"c4d-highcpu-96":         true,
+	"c4d-highcpu-192":        true,
+	"c4d-highcpu-384":        true,
+	"c4d-highcpu-384-metal":  true,
+	"c4d-highmem-2":          true,
+	"c4d-highmem-4":          true,
+	"c4d-highmem-8":          true,
+	"c4d-highmem-16":         true,
+	"c4d-highmem-32":         true,
+	"c4d-highmem-48":         true,
+	"c4d-highmem-64":         true,
+	"c4d-highmem-96":         true,
+	"c4d-highmem-192":        true,
+	"c4d-highmem-384":        true,
+	"c4d-highmem-384-metal":  true,
+	"c4d-highmem-8-lssd":     true,
+	"c4d-highmem-16-lssd":    true,
+	"c4d-highmem-32-lssd":    true,
+	"c4d-highmem-48-lssd":    true,
+	"c4d-highmem-64-lssd":    true,
+	"c4d-highmem-96-lssd":    true,
+	"c4d-highmem-192-lssd":   true,
+	"c4d-highmem-384-lssd":   true,
 	// E2
 	"e2-micro":       true,
 	"e2-small":       true,