Add missing parameter to the stub of mysqli_real_connect

Author: kocsismate

ext/mysqli/mysqli.stub.php

@@ -414,6 +414,7 @@ function mysqli_real_connect(
     ?string $password = null,
     ?string $database = null,
     ?int $port = null,
+    ?string $socket = null,
     int $flags = 0
 ): bool {}
 

ext/mysqli/mysqli_arginfo.h

@@ -238,6 +238,7 @@ ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_mysqli_real_connect, 0, 1, _IS_B
 	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, password, IS_STRING, 1, "null")
 	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, database, IS_STRING, 1, "null")
 	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, port, IS_LONG, 1, "null")
+	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, socket, IS_STRING, 1, "null")
 	ZEND_ARG_TYPE_INFO_WITH_DEFAULT_VALUE(0, flags, IS_LONG, 0, "0")
 ZEND_END_ARG_INFO()