apache2配置重启失败，AH01630和AH00169

本来的目的是更换apache2中PHP的默认执行目录，进行如下操作：

cd /etc/apache2/sites-available
sudo vim 000-default.conf

<VirtualHost *:80>
        # The ServerName directive sets the request scheme, hostname and port that
        # the server uses to identify itself. This is used when creating
        # redirection URLs. In the context of virtual hosts, the ServerName
        # specifies what hostname must appear in the request's Host: header to
        # match this virtual host. For the default virtual host (this file) this
        # value is not decisive as it is