set default i2cp.leaseSetEncType to 0,4 and to 4 for server tunnels

libi2pd_client/ClientContext.cpp

@@ -475,7 +475,7 @@ namespace client
 		options[I2CP_PARAM_STREAMING_MAX_INBOUND_SPEED] = GetI2CPOption(section, I2CP_PARAM_STREAMING_MAX_INBOUND_SPEED, DEFAULT_MAX_INBOUND_SPEED);
 		options[I2CP_PARAM_STREAMING_ANSWER_PINGS] = GetI2CPOption(section, I2CP_PARAM_STREAMING_ANSWER_PINGS, isServer ? DEFAULT_ANSWER_PINGS : false);
 		options[I2CP_PARAM_LEASESET_TYPE] = GetI2CPOption(section, I2CP_PARAM_LEASESET_TYPE, DEFAULT_LEASESET_TYPE);
-		std::string encType = GetI2CPStringOption(section, I2CP_PARAM_LEASESET_ENCRYPTION_TYPE, "0,4");
+		std::string encType = GetI2CPStringOption(section, I2CP_PARAM_LEASESET_ENCRYPTION_TYPE, isServer ? "4" : "0,4");
 		if (encType.length () > 0) options[I2CP_PARAM_LEASESET_ENCRYPTION_TYPE] = encType;
 		std::string privKey = GetI2CPStringOption(section, I2CP_PARAM_LEASESET_PRIV_KEY, "");
 		if (privKey.length () > 0) options[I2CP_PARAM_LEASESET_PRIV_KEY] = privKey;