Add correct name for allow-from (#244)

* Add correct name for allow-from

* Update public API

Author: andrewlock

src/NetEscapades.AspNetCore.SecurityHeaders/Headers/XFrameOptionsHeaderExtensions.cs

@@ -38,6 +38,16 @@ public static HeaderPolicyCollection AddFrameOptionsSameOrigin(this HeaderPolicy
     /// <param name="uri">The uri of the origin in which the page may be displayed in a frame</param>
     /// <returns>The <see cref="HeaderPolicyCollection"/> for method chaining</returns>
     public static HeaderPolicyCollection AddFrameOptionsSameOrigin(this HeaderPolicyCollection policies, string uri)
+        => policies.AddFrameOptionsAllowFrom(uri);
+
+    /// <summary>
+    /// Add X-Frame-Options ALLOW-FROM {uri} to all requests, where the uri is provided
+    /// The page can only be displayed in a frame on the specified origin.
+    /// </summary>
+    /// <param name="policies">The collection of policies</param>
+    /// <param name="uri">The uri of the origin in which the page may be displayed in a frame</param>
+    /// <returns>The <see cref="HeaderPolicyCollection"/> for method chaining</returns>
+    public static HeaderPolicyCollection AddFrameOptionsAllowFrom(this HeaderPolicyCollection policies, string uri)
     {
         return policies.ApplyPolicy(new XFrameOptionsHeader($"ALLOW-FROM {uri}"));
     }

test/NetEscapades.AspNetCore.SecurityHeaders.Test/PublicApiTest.PublicApiHasNotChanged.verified.txt

@@ -267,6 +267,7 @@ namespace Microsoft.AspNetCore.Builder
     }
     public static class XFrameOptionsHeaderExtensions
     {
+        public static Microsoft.AspNetCore.Builder.HeaderPolicyCollection AddFrameOptionsAllowFrom(this Microsoft.AspNetCore.Builder.HeaderPolicyCollection policies, string uri) { }
         public static Microsoft.AspNetCore.Builder.HeaderPolicyCollection AddFrameOptionsDeny(this Microsoft.AspNetCore.Builder.HeaderPolicyCollection policies) { }
         public static Microsoft.AspNetCore.Builder.HeaderPolicyCollection AddFrameOptionsSameOrigin(this Microsoft.AspNetCore.Builder.HeaderPolicyCollection policies) { }
         public static Microsoft.AspNetCore.Builder.HeaderPolicyCollection AddFrameOptionsSameOrigin(this Microsoft.AspNetCore.Builder.HeaderPolicyCollection policies, string uri) { }