DLE: php network getaddresses: getaddrinfo failed

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DLE: php network getaddresses: getaddrinfo failed

Ошибка вида:

MySQL error in file: /engine/classes/mysql.php at line 52
Error Number: 1
The Error returned was:
php_network_getaddresses: getaddrinfo failed: ??? ??? ?????? ?? ???????? 
SQL query:

говорит о том, что неверно прописан адрес сервера mysql: DBHOST в конфиг файле engine/data/dbconfig.php:

define ("DBHOST", "localhost");