Set default protocol to HTTP/1.x

Author: John Luo

src/Kestrel.Core/ListenOptions.cs

@@ -126,8 +126,8 @@ public FileHandleType HandleType
         /// <summary>
         /// The protocols enabled on this endpoint.
         /// </summary>
-        /// <remarks>Defaults to HTTP/1.x and HTTP/2.</remarks>
-        public HttpProtocols Protocols { get; set; } = HttpProtocols.Http1AndHttp2;
+        /// <remarks>Defaults to HTTP/1.x.</remarks>
+        public HttpProtocols Protocols { get; set; } = HttpProtocols.Http1;
 
         /// <summary>
         /// Gets the <see cref="List{IConnectionAdapter}"/> that allows each connection <see cref="System.IO.Stream"/>

test/Kestrel.Core.Tests/ListenOptionsTests.cs

@@ -15,7 +15,7 @@ public class ListenOptionsTests
         public void ProtocolsDefault()
         {
             var listenOptions = new ListenOptions(new IPEndPoint(IPAddress.Loopback, 0));
-            Assert.Equal(HttpProtocols.Http1AndHttp2, listenOptions.Protocols);
+            Assert.Equal(HttpProtocols.Http1, listenOptions.Protocols);
         }
 
         [Fact]

test/Kestrel.Tests/KestrelConfigurationBuilderTests.cs

@@ -385,7 +385,7 @@ public void EndpointConfigSectionCanSetProtocols(string input, HttpProtocols exp
             serverOptions.ConfigureEndpointDefaults(opt =>
             {
                 // Kestrel default.
-                Assert.Equal(HttpProtocols.Http1AndHttp2, opt.Protocols);
+                Assert.Equal(HttpProtocols.Http1, opt.Protocols);
                 ranDefault = true;
             });
 
@@ -415,14 +415,14 @@ public void EndpointConfigSectionCanSetProtocols(string input, HttpProtocols exp
                 .LocalhostEndpoint(5002, opt =>
                 {
                     // Kestrel default.
-                    Assert.Equal(HttpProtocols.Http1AndHttp2, opt.Protocols);
+                    Assert.Equal(HttpProtocols.Http1, opt.Protocols);
                     ran2 = true;
                 })
                 .Load();
             serverOptions.ListenAnyIP(0, opt =>
             {
                 // Kestrel default.
-                Assert.Equal(HttpProtocols.Http1AndHttp2, opt.Protocols);
+                Assert.Equal(HttpProtocols.Http1, opt.Protocols);
                 ran3 = true;
             });