WIP: cmd text fix for pdns provider

pkg/apis/externaldns/types.go

@@ -137,7 +137,7 @@ func (cfg *Config) ParseFlags(args []string) error {
 	app.Flag("publish-internal-services", "Allow external-dns to publish DNS records for ClusterIP services (optional)").BoolVar(&cfg.PublishInternal)
 
 	// Flags related to providers
-	app.Flag("provider", "The DNS provider where the DNS records will be created (required, options: aws, google, azure, cloudflare, digitalocean, dnsimple, infoblox, inmemory)").Required().PlaceHolder("provider").EnumVar(&cfg.Provider, "aws", "google", "azure", "cloudflare", "digitalocean", "dnsimple", "infoblox", "inmemory", "pdns")
+	app.Flag("provider", "The DNS provider where the DNS records will be created (required, options: aws, google, azure, cloudflare, digitalocean, dnsimple, infoblox, inmemory, pdns)").Required().PlaceHolder("provider").EnumVar(&cfg.Provider, "aws", "google", "azure", "cloudflare", "digitalocean", "dnsimple", "infoblox", "inmemory", "pdns")
 	app.Flag("domain-filter", "Limit possible target zones by a domain suffix; specify multiple times for multiple domains (optional)").Default("").StringsVar(&cfg.DomainFilter)
 	app.Flag("zone-id-filter", "Filter target zones by hosted zone id; specify multiple times for multiple zones (optional)").Default("").StringsVar(&cfg.ZoneIDFilter)
 	app.Flag("google-project", "When using the Google provider, specify the Google project (required when --provider=google)").Default(defaultConfig.GoogleProject).StringVar(&cfg.GoogleProject)