rabbitmq.conf.example: add two new recently added stream settings

(cherry picked from commit 15a09cde9196e2b94805060da9ee38c9cfb65ffd)

Author: michaelklishin

deps/rabbit/docs/rabbitmq.conf.example

@@ -512,6 +512,11 @@
 # stream.replication.port_range.min = 5000
 # stream.replication.port_range.max = 10000
 
+## IP address family used by stream replication listeners.
+## Supported values are: inet (IPv4), inet6 (IPv6), ipv4, ipv6.
+##
+# stream.replication.address_family = inet6
+
 ## Advertised hostname and port for stream clients. Use when RabbitMQ
 ## is behind a load balancer or in a container environment.
 ##
@@ -525,6 +530,11 @@
 # stream.advertised_tls_host = localhost
 # stream.advertised_tls_port = 5553
 
+## Allows for using a custom data directory for streams, for example,
+## a dedicated volume with particularly fast storage.
+##
+# stream.data_dir = /data/rabbitmq/streams
+
 ##
 ## Resource Limits & Flow Control
 ##