Remove old comment and fix listen_addr

doc/administration/gitaly/praefect.md

@@ -194,8 +194,6 @@ application server, or a Gitaly node.
    - `PRAEFECT_HOST` with the IP address or hostname of the Praefect node
 
    ```ruby
-   # Make Praefect accept connections on all network interfaces.
-   # Use firewalls to restrict access to this address/port.
    praefect['listen_addr'] = 'PRAEFECT_HOST:2305'
 
    # Enable Prometheus metrics access to Praefect. You must use firewalls
@@ -532,7 +530,7 @@ Particular attention should be shown to:
    `/etc/gitlab/gitlab.rb`
 
    ```ruby
-   gitaly['listen_addr'] = 'tcp://GITLAB_HOST:8075'
+   gitaly['listen_addr'] = 'GITLAB_HOST:8075'
    ```
 
 1. Configure the `gitlab_shell['secret_token']` so that callbacks from Gitaly