UpdatePhotonThrottling only runs when using Photon over UDP, is disabled for TCP.

Added Photon server config documentation

SERVERS.md

@@ -5,15 +5,31 @@
 Requests are sent after the game client authenticates with the server.
 
 ## Endpoints
-### `API: GET "/api/undead/v1/emotes"`
-Expects: `List<EmoteConfigDTO>`
 
-[EmoteConfigDTO](#emoteconfigdto)
+### `API: GET "/api/undead/v1/emotes"`
+Expects: `List<EmoteConfigDTO>` [(to DTO)](#emoteconfigdto)
 
 Replace existing emotes in the game with these, keyed by `UniqueName`.
-See [the source](./Core/CustomRecNet/CustomEmotes/RecNetEmotes.cs) for more information.
+
+See [the source](.\Core\CustomRecNet\CustomEmotes\RecNetEmotes.cs) for more information.
+
+### `API: GET "/api/undead/v1/photon"`
+Expects: `PhotonConfigDTO` [(to DTO)](#photonconfigdto)
+
+The patch uses a Photon configuration given by the server.<br>
+When this fails, the patch will fall back to the local config, if enabled.
+
+`ConnectionProtocol` is 0 for UDP, or 1 for TCP. Use UDP if you don't know what to use.<br>
+`ServerAddress`, `ServerPort`, and `ConnectionProtocol` are ignored when `SelfHosted` is enabled.
+
+When using a self-hosted server, ideally, you should set the `AppID` *and* `VoiceAppID` to the name<br>
+of your application, e.g. Master when using the port for a default Masterserver.<br>
+Voice will go over the same gameserver port as PUN does when selfhosting.
+
+See [the source](.\Core\Content\CustomRecNet\CustomPhoton\CustomPhoton.cs) for more information.
 
 ## DTOs
+
 ### `EmoteConfigDTO`
 ```c#
 public class EmoteConfigDTO
@@ -25,4 +41,18 @@ public class EmoteConfigDTO
     public bool ForceEmoteBubble { get; set; }
     public bool OnlyBroadcastToTeam { get; set; }
 }
+```
+
+### `PhotonConfigDTO`
+```c#
+public class PhotonConfigDTO
+{
+    public bool Logging { get; set; }
+    public string AppID { get; set; }
+    public string VoiceAppID { get; set; }
+    public bool SelfHosted { get; set; }
+    public string ServerAddress { get; set; }
+    public int ServerPort { get; set; }
+    public byte ConnectionProtocol { get; set; }
+}
 ```