Merge pull request #111530 from vojta001/nixos-container-show-ip-ipv6

nixos-container: fix show-ip command to support IPv6 addresses

pkgs/tools/virtualization/nixos-container/nixos-container.pl

@@ -458,7 +458,9 @@ elsif ($action eq "run") {
 
 elsif ($action eq "show-ip") {
     my $s = read_file($confFile) or die;
-    $s =~ /^LOCAL_ADDRESS=([0-9\.]+)(\/[0-9]+)?$/m or die "$0: cannot get IP address\n";
+    $s =~ /^LOCAL_ADDRESS=([0-9\.]+)(\/[0-9]+)?$/m
+        or $s =~ /^LOCAL_ADDRESS6=([0-9a-f:]+)(\/[0-9]+)?$/m
+        or die "$0: cannot get IP address\n";
     print "$1\n";
 }