Add tracing around Client#make_response.

lib/async/http/client.rb

@@ -101,7 +101,7 @@ def call(request)
 					# As we cache pool, it's possible these pool go bad (e.g. closed by remote host). In this case, we need to try again. It's up to the caller to impose a timeout on this. If this is the last attempt, we force a new connection.
 					connection = @pool.acquire
 
-					response = make_response(request, connection)
+					response = make_response(request, connection, attempt)
 
 					# This signals that the ensure block below should not try to release the connection, because it's bound into the response which will be returned:
 					connection = nil
@@ -177,12 +177,22 @@ def call(request)
 							end
 						end
 					end
+
+					def make_response(request, connection, attempt)
+						attributes = {
+							'attempt': attempt,
+						}
+
+						Traces.trace("async.http.client.make_response", attributes: attributes) do
+							super
+						end
+					end
 				end
 			end
 
 			protected
 
-			def make_response(request, connection)
+			def make_response(request, connection, attempt)
 				response = request.call(connection)
 
 				response.pool = @pool