Update service socket docs

docs/Formula-Cookbook.md

@@ -1052,6 +1052,24 @@ The `sockets` method accepts a formatted socket definition as `<type>://<host>:<
 
 Please note that sockets will be accessible on IPv4 and IPv6 addresses by default.
 
+If you only need one socket and you don't care about the name (the default is `Listeners`):
+
+```rb
+service do
+  run [opt_bin/"beanstalkd", "test"]
+  sockets "tcp://127.0.0.1:80"
+end
+```
+
+If you need multiple sockets and/or you want to specify the name:
+
+```rb
+service do
+  run [opt_bin/"beanstalkd", "test"]
+  sockets "Socket" => "tcp://0.0.0.0:80", "SocketTLS" => "tcp://0.0.0.0:443"
+end
+```
+
 ### Using environment variables
 
 Homebrew has multiple levels of environment variable filtering which affects which variables are available to formulae.