Retrieved binary field isn't properly unescaped when merge a MyBB database

[yuliu]

For example, merging a MyBB on a PostgreSQL database to a MySQL database, the users and posts modules would have the SQL errors of regip, lastip, ipaddress (the column name) is too long.

Those binary fields need to be unescaped before sending to the be converted so that they'll get properly escaped.

// users module
$insert_data['regip'] = $this->old_db->unescape_binary($data['regip']);
$insert_data['lastip'] = $this->old_db->unescape_binary($data['lastip']);

// posts module
$insert_data['ipaddress'] = $this->old_db->unescape_binary($data['ipaddress']);

// pollvotes module
$insert_data['ipaddress'] = $this->old_db->unescape_binary($data['ipaddress']);

// privatemessages module
$insert_data['ipaddress'] = $this->old_db->unescape_binary($data['ipaddress']);