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

libi2pd/Destination.cpp

@@ -1013,18 +1013,15 @@ namespace client
 			}
 		}
 		// if no param or valid crypto type use from identity
-		bool isSingleKey = false;
 		if (encryptionKeyTypes.empty ())
-		{
-			isSingleKey = true;
-			encryptionKeyTypes.insert (GetIdentity ()->GetCryptoKeyType ());
-		}
+			encryptionKeyTypes.insert ( { GetIdentity ()->GetCryptoKeyType (),
+				i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD }); // usually 0,4
 
 		for (auto& it: encryptionKeyTypes)
 		{
 			auto encryptionKey = new EncryptionKey (it);
 			if (IsPublic ())
-				PersistTemporaryKeys (encryptionKey, isSingleKey);
+				PersistTemporaryKeys (encryptionKey);
 			else
 				encryptionKey->GenerateKeys ();
 			encryptionKey->CreateDecryptor ();
@@ -1383,12 +1380,11 @@ namespace client
 		return ret;
 	}
 
-	void ClientDestination::PersistTemporaryKeys (EncryptionKey * keys, bool isSingleKey)
+	void ClientDestination::PersistTemporaryKeys (EncryptionKey * keys)
 	{
 		if (!keys) return;
 		std::string ident = GetIdentHash().ToBase32();
-		std::string path  = i2p::fs::DataDirPath("destinations",
-			isSingleKey ? (ident + ".dat") : (ident + "." + std::to_string (keys->keyType) + ".dat"));
+		std::string path  = i2p::fs::DataDirPath("destinations", ident + "." + std::to_string (keys->keyType) + ".dat");
 		std::ifstream f(path, std::ifstream::binary);
 
 		if (f) {

libi2pd/Destination.h

@@ -289,7 +289,7 @@ namespace client
 			std::shared_ptr<ClientDestination> GetSharedFromThis () {
 				return std::static_pointer_cast<ClientDestination>(shared_from_this ());
 			}
-			void PersistTemporaryKeys (EncryptionKey * keys, bool isSingleKey);
+			void PersistTemporaryKeys (EncryptionKey * keys);
 			void ReadAuthKey (const std::string& group, const std::map<std::string, std::string> * params);
 
 			template<typename Dest>