Added renders for is form content type and is https

src/NLog.Web.AspNetCore/LayoutRenderers/AspNetRequestIsFormContentTypeLayoutRenderer.cs

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+using NLog.LayoutRenderers;
+using NLog.Web.Internal;
+using System.Text;
+
+namespace NLog.Web.LayoutRenderers
+{
+    /// <summary>
+    /// ASP.NET Is Request Form Content Type
+    /// </summary>
+    /// <remarks>
+    /// ${aspnet-request-is-form-content-type}
+    /// </remarks>
+    [LayoutRenderer("aspnet-request-is-form-content-type")]
+    public class AspNetRequestIsFormContentTypeLayoutRenderer : AspNetLayoutRendererBase
+    {
+        /// <summary>
+        /// Renders the specified ASP.NET Core HttpContext.Request.HasFormContentType variable and appends it to the specified <see cref="StringBuilder" />.
+        /// </summary>
+        /// <param name="builder">The <see cref="StringBuilder" /> to append the rendered data to.</param>
+        /// <param name="logEvent">Logging event.</param>
+        protected override void DoAppend(StringBuilder builder, LogEventInfo logEvent)
+        {
+            var request = HttpContextAccessor.HttpContext?.TryGetRequest();
+            builder.Append(request?.HasFormContentType == true ? '1' : '0');
+        }
+    }
+}

src/NLog.Web.AspNetCore/LayoutRenderers/AspNetRequestIsHttpsLayoutRenderer.cs

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+using NLog.LayoutRenderers;
+using NLog.Web.Internal;
+using System.Text;
+
+namespace NLog.Web.LayoutRenderers
+{
+    /// <summary>
+    /// ASP.NET Is Request HTTPS
+    /// </summary>
+    /// <remarks>
+    /// ${aspnet-request-is-https}
+    /// </remarks>
+    [LayoutRenderer("aspnet-request-is-https")]
+    public class AspNetRequestIsHttpsLayoutRenderer : AspNetLayoutRendererBase
+    {
+        /// <summary>
+        /// Renders the specified ASP.NET Core HttpContext.Request.IsHttps variable and appends it to the specified <see cref="StringBuilder" />.
+        /// </summary>
+        /// <param name="builder">The <see cref="StringBuilder" /> to append the rendered data to.</param>
+        /// <param name="logEvent">Logging event.</param>
+        protected override void DoAppend(StringBuilder builder, LogEventInfo logEvent)
+        {
+            var request = HttpContextAccessor.HttpContext?.TryGetRequest();
+            builder.Append(request?.IsHttps == true ? '1' : '0');
+        }
+    }
+}

tests/NLog.Web.AspNetCore.Tests/LayoutRenderers/AspNetRequestIsFormContentTypeLayoutRendererTests.cs

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+using NLog.Web.LayoutRenderers;
+using NSubstitute;
+using NSubstitute.ReturnsExtensions;
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Xunit;
+
+namespace NLog.Web.Tests.LayoutRenderers
+{
+    public class AspNetRequestIsFormContentTypeLayoutRendererTests : LayoutRenderersTestBase<AspNetRequestIsFormContentTypeLayoutRenderer>
+    {
+        [Fact]
+        public void TrueTest()
+        {
+            // Arrange
+            var (renderer, httpContext) = CreateWithHttpContext();
+
+            httpContext.Request.HasFormContentType.Returns(true);
+            // Act
+            string result = renderer.Render(new LogEventInfo());
+            // Assert
+            Assert.Equal("1", result);
+        }
+
+        [Fact]
+        public void FalseTest()
+        {
+            // Arrange
+            var (renderer, httpContext) = CreateWithHttpContext();
+
+            httpContext.Request.HasFormContentType.Returns(false);
+            // Act
+            string result = renderer.Render(new LogEventInfo());
+            // Assert
+            Assert.Equal("0", result);
+        }
+
+        [Fact]
+        public void NullTest()
+        {
+            // Arrange
+            var (renderer, httpContext) = CreateWithHttpContext();
+
+            httpContext.Request.ReturnsNull();
+            // Act
+            string result = renderer.Render(new LogEventInfo());
+            // Assert
+            Assert.Equal("0", result);
+        }
+
+        protected override void NullRendersEmptyString()
+        {
+            // Arrange
+            var (renderer, _) = CreateWithHttpContext();
+
+            // Act
+            string result = renderer.Render(LogEventInfo.CreateNullEvent());
+
+            // Assert
+            Assert.Equal("0", result);
+        }
+    }
+}

tests/NLog.Web.AspNetCore.Tests/LayoutRenderers/AspNetRequestIsHttpsLayoutRendererTests.cs

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+using NLog.Web.LayoutRenderers;
+using NSubstitute;
+using NSubstitute.ReturnsExtensions;
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Xunit;
+
+namespace NLog.Web.Tests.LayoutRenderers
+{
+    public class AspNetRequestIsHttpsLayoutRendererTests : LayoutRenderersTestBase<AspNetRequestIsHttpsLayoutRenderer>
+    {
+        [Fact]
+        public void TrueTest()
+        {
+            // Arrange
+            var (renderer, httpContext) = CreateWithHttpContext();
+
+            httpContext.Request.IsHttps.Returns(true);
+            // Act
+            string result = renderer.Render(new LogEventInfo());
+            // Assert
+            Assert.Equal("1", result);
+        }
+
+        [Fact]
+        public void FalseTest()
+        {
+            // Arrange
+            var (renderer, httpContext) = CreateWithHttpContext();
+
+            httpContext.Request.IsHttps.Returns(false);
+            // Act
+            string result = renderer.Render(new LogEventInfo());
+            // Assert
+            Assert.Equal("0", result);
+        }
+
+        [Fact]
+        public void NullTest()
+        {
+            // Arrange
+            var (renderer, httpContext) = CreateWithHttpContext();
+
+            httpContext.Request.ReturnsNull();
+            // Act
+            string result = renderer.Render(new LogEventInfo());
+            // Assert
+            Assert.Equal("0", result);
+        }
+
+        protected override void NullRendersEmptyString()
+        {
+            // Arrange
+            var (renderer, _) = CreateWithHttpContext();
+
+            // Act
+            string result = renderer.Render(LogEventInfo.CreateNullEvent());
+
+            // Assert
+            Assert.Equal("0", result);
+        }
+    }
+}