Add NixOS IPv6 documentation to readme

diff --git a/readme_template.md b/readme_template.md
index 223bae8652df91138ccbd95bc401f3d3112bd505..b9e134fce1afb1af476925bf5ceecdf09a391fc0 100644 (file)
--- a/readme_template.md
+++ b/readme_template.md
@@ -405,6 +405,7 @@ The hosts extensions are also available with the following options:
 ```nix
 {
   networking.stevenBlackHosts = {
+    enableIPv6 = true;
     blockFakenews = true;
     blockGambling = true;
     blockPorn = true;
@@ -413,6 +414,8 @@ The hosts extensions are also available with the following options:
 }
 ```
 
+IPv6 rules are enabled by default when `networking.enableIPv6` is set to `true`.
+
 ## Updating hosts file on Windows
 
 (NOTE: See also some third-party Hosts managers, listed below.)