Magento2部分网站出现新装或是未装就500错误，这种情况一般是伪静态问题，在部分APACHE环境下，不支持if语句，移除
.htaccess中的
<Files RELEASE_NOTES.txt>
<IfVersion < 2.4>
order allow,deny
deny from all
</IfVersion>
<IfVersion >= 2.4>
Require all denied
</IfVersion>
</Files>
<Files .htaccess>
<IfVersion < 2.4>
order allow,deny
deny from all
</IfVersion>
<IfVersion >= 2.4>
Require all denied
</IfVersion>
</Files>
## Deny access to cron.php
<Files cron.php>
<IfVersion < 2.4>
order allow,deny
deny from all
</IfVersion>
<IfVersion >= 2.4>
Require all denied
</IfVersion>
</Files>
## Deny access to .user.ini
<Files .user.ini>
<IfVersion < 2.4>
order allow,deny
deny from all
</IfVersion>
<IfVersion >= 2.4>
Require all denied
</IfVersion>
</Files>
