Add "ZoneSettings" extensions

Extensions/Cloudflare.Zones/Models/Settings/OpportunisticOnion.cs

@@ -0,0 +1,23 @@
+namespace AMWD.Net.Api.Cloudflare.Zones
+{
+	/// <summary>
+	/// Add an Alt-Svc header to all legitimate requests from Tor, allowing the
+	/// connection to use our onion services instead of exit nodes.
+	/// </summary>
+	public class OpportunisticOnion : ZoneSettingBase
+	{
+		/// <summary>
+		/// Initializes a new instance of the <see cref="OpportunisticOnion"/> class.
+		/// </summary>
+		public OpportunisticOnion()
+		{
+			Id = ZoneSettingId.OpportunisticOnion;
+		}
+
+		/// <summary>
+		/// Current value of the zone setting.
+		/// </summary>
+		[JsonProperty("value")]
+		public OnOffState? Value { get; set; }
+	}
+}