Update vpn_server.config

SoftEther/vpn_server.config

@@ -138,7 +138,7 @@ declare root
 			bool RadiusConvertAllMsChapv2AuthRequestToEap false
 			string RadiusRealm $
 			uint RadiusRetryInterval 0
-			uint RadiusServerPort 1812
+			uint RadiusServerPort 0
 			string RadiusSuffixFilter $
 			bool RadiusUsePeapInsteadOfEap false
 			uint Type 0