HTTP/3 add http3 variables conditionally

Author: marcel2012

rootfs/etc/nginx/template/nginx.tmpl

@@ -2,6 +2,7 @@
 {{ $servers := .Servers }}
 {{ $cfg := .Cfg }}
 {{ $IsIPV6Enabled := .IsIPV6Enabled }}
+{{ $IsQUICEnabled := .IsQUICEnabled }}
 {{ $healthzURI := .HealthzURI }}
 {{ $backends := .Backends }}
 {{ $proxyHeaders := .ProxySetHeaders }}
@@ -288,8 +289,10 @@ http {
 
     http2_max_concurrent_streams    {{ $cfg.HTTP2MaxConcurrentStreams }};
 
+    {{ if $IsQUICEnabled }}
     http3_max_concurrent_streams    {{ $cfg.HTTP3MaxConcurrentStreams }};
     http3_stream_buffer_size        {{ $cfg.HTTP3StreamBufferSize }};
+    {{ end }}
 
     types_hash_max_size             2048;
     server_names_hash_max_size      {{ $cfg.ServerNameHashMaxSize }};