Refine header parse

shadowsocks-csharp/Controller/Service/Http2Socks5.cs

@@ -387,6 +387,11 @@ namespace Shadowsocks.Controller.Service
 
                 Logging.Debug(line);
 
+                if (!line.StartsWith("Proxy-"))
+                {
+                    _headers.Enqueue(line);
+                }
+
                 if (_requestLineCount == 0)
                 {
                     var m = HttpRequestHeaderRegex.Match(line);
@@ -413,21 +418,14 @@ namespace Shadowsocks.Controller.Service
                                 _targetPort = 80;
                             }
                         }
-
-                        _headers.Enqueue(line);
                     }
                 }
                 else
                 {
                     if (line.IsNullOrEmpty())
                     {
-                        _headers.Enqueue("");
                         return true;
                     }
-                    if (!line.StartsWith("Proxy-"))
-                    {
-                        _headers.Enqueue(line);
-                    }
 
                     if (!_isConnect)
                     {