Document that providers don't (or do) add domains to your account automatically.

docs/_providers/cloudflare.md

@@ -46,3 +46,9 @@ D("example.tld", REG_NAMECOM, DnsProvider(CFLARE),
 ## Activation
 
 DNSControl depends on a Cloudflare Global API Key that's available under "My Settings".
+
+## New domains
+
+If a domain does not exist in your CloudFlare account, DNSControl
+will *not* automatically add it. You'll need to do that via the
+control panel manually.

docs/_providers/gandi.md

@@ -35,3 +35,9 @@ D("example.tld", REG_NAMECOM, DnsProvider(GANDI),
     A("test","1.2.3.4")
 );
 {% endhighlight %}
+
+## New domains
+
+If a domain does not exist in your Gandi account, DNSControl
+will *not* automatically add it. You'll need to do that via the
+control panel manually.

docs/_providers/gcloud.md

@@ -56,3 +56,9 @@ D("example.tld", REG_NAMECOM, DnsProvider(GCLOUD),
 
 3. Choose an existing user, or create a new one. The user requires "App Engine Admin" rights.
 4. Download the JSON key and copy it into your `creds.json` under the name of your gcloud provider.
+
+## New domains
+
+If a domain does not exist in your Google Cloud DNS account, DNSControl
+will *not* automatically add it. You'll need to do that via the
+control panel manually.

docs/_providers/route53.md

@@ -38,3 +38,10 @@ D("example.tld", REG_NAMECOM, DnsProvider(R53),
 ## Activation
 
 DNSControl depends on a standard [aws access key](https://aws.amazon.com/developers/access-keys/) with permission to create and update hosted zones.
+
+## New domains
+
+If a domain does not exist in your Route53 account, DNSControl 
+will *not* automatically add it. You can do that either manually
+via the control panel, or via the command `dnscontrol create-domains`
+command.