matrix: Update irc-bridge config from config.sample.yaml

roles/matrix/templates/irc-bridge.yaml.j2

@@ -312,7 +312,8 @@ ircService:
           # connected user. If not specified, all users will connect from the same
           # (default) address. This may require additional OS-specific work to allow
           # for the node process to bind to multiple different source addresses
-          # e.g IP_FREEBIND on Linux, which requires an LD_PRELOAD with the library
+          # Linux kernels 4.3+ support sysctl net.ipv6.ip_nonlocal_bind=1
+          # Older kernels will need IP_FREEBIND, which requires an LD_PRELOAD with the library
           # https://github.com/matrix-org/freebindfree as Node does not expose setsockopt.
           # prefix: "2001:0db8:85a3::"  # modify appropriately
         #
@@ -353,6 +354,11 @@ ircService:
         userModes: '{{ settings.user_modes }}'
 
 {% endfor %}
+  # Set information about the bridged channel in the room state, so that client's may
+  # present relevant UI to the user. MSC2346
+  bridgeInfoState:
+    enabled: false
+    initial: false
   # Configuration for an ident server. If you are running a public bridge it is
   # advised you setup an ident server so IRC mods can ban specific matrix users
   # rather than the application service itself.