Fix WordPress can't update itself or plugins

If you’re faced with this horror (usually happens when Ask Apache Protect is installed) there is a fix, which I believe should be included into the new WordPress release.

In wp-admin / admin.php there are these lines:

!defined('FS_CHMOD_DIR') && define('FS_CHMOD_DIR', (S_IRWUGO & ~ umask()));
!defined('FS_CHMOD_FILE') && define('FS_CHMOD_FILE', (S_IRWXUGO & ~ umask()));

Which are ok but S_IRWUGO = 0666 and S_IRWXUGO = 0777 so for each files WordPress sets rwxrwxrwx and rw-rw-rw- for folders which is not correct and leads to problems sometimes.

To fix this change those lines to;

!defined('FS_CHMOD_DIR') && define('FS_CHMOD_DIR', (S_IRWXUGO & ~ umask()));
!defined('FS_CHMOD_FILE') && define('FS_CHMOD_FILE', (S_IRWUGO & ~ umask()));