No body for head request (#695)

src/Titanium.Web.Proxy/Http/HttpWebClient.cs

@@ -166,6 +166,8 @@ internal async Task ReceiveResponse(CancellationToken cancellationToken)
                 return;
             }
 
+            Response.RequestMethod = Request.Method;
+
             var httpStatus = await Connection.Stream.ReadResponseStatus(cancellationToken);
             Response.HttpVersion = httpStatus.Version;
             Response.StatusCode = httpStatus.StatusCode;

src/Titanium.Web.Proxy/Http/Response.cs

@@ -36,13 +36,20 @@ public Response(byte[] body)
         /// </summary>
         public string StatusDescription { get; set; } = string.Empty;
 
+        internal string RequestMethod { get; set; }
+
         /// <summary>
         ///     Has response body?
         /// </summary>
         public override bool HasBody
         {
             get
             {
+                if (RequestMethod == "HEAD")
+                {
+                    return false;
+                }
+
                 long contentLength = ContentLength;
 
                 // If content length is set to 0 the response has no body