DOCS: SOA RNAME description isn't accurate (#3481)

Author: jpmens

documentation/language-reference/domain-modifiers/SOA.md

@@ -25,15 +25,11 @@ parameter_types:
 {% code title="dnsconfig.js" %}
 ```javascript
 D("example.com", REG_MY_PROVIDER, DnsProvider(DSP_MY_PROVIDER),
-  SOA("@", "ns3.example.com.", "hostmaster@example.com", 3600, 600, 604800, 1440),
+  SOA("@", "ns3.example.com.", "hostmaster.example.com.", 3600, 600, 604800, 1440),
 );
 ```
 {% endcode %}
 
-If you accidentally include an `@` in the email field DNSControl will quietly
-change it to a `.`. This way you can specify a human-readable email address
-when you are making it easier for spammers how to find you.
-
 ## Notes
 * The serial number is managed automatically.  It isn't even a field in `SOA()`.
 * Most providers automatically generate SOA records.  They will ignore any `SOA()` statements.