Connection Closed errors should include the exception obj

src/Discord.Net/Audio/AudioClient.cs

@@ -86,7 +86,7 @@ namespace Discord.Audio
             ApiClient.Disconnected += async ex =>
             {
                 if (ex != null)
-                    await _audioLogger.WarningAsync($"Connection Closed: {ex.Message}").ConfigureAwait(false);
+                    await _audioLogger.WarningAsync($"Connection Closed", ex).ConfigureAwait(false);
                 else
                     await _audioLogger.WarningAsync($"Connection Closed").ConfigureAwait(false);
             };

src/Discord.Net/Rpc/DiscordRpcClient.cs

@@ -47,7 +47,7 @@ namespace Discord.Rpc
             {
                 if (ex != null)
                 {
-                    await _rpcLogger.WarningAsync($"Connection Closed: {ex.Message}").ConfigureAwait(false);
+                    await _rpcLogger.WarningAsync($"Connection Closed", ex).ConfigureAwait(false);
                     await StartReconnectAsync(ex).ConfigureAwait(false);
                 }
                 else

src/Discord.Net/WebSocket/DiscordSocketClient.cs

@@ -92,7 +92,7 @@ namespace Discord.WebSocket
             {
                 if (ex != null)
                 {
-                    await _gatewayLogger.WarningAsync($"Connection Closed: {ex.Message}").ConfigureAwait(false);
+                    await _gatewayLogger.WarningAsync($"Connection Closed", ex).ConfigureAwait(false);
                     await StartReconnectAsync(ex).ConfigureAwait(false);
                 }
                 else