V2.0

Enhanced automatic installation, More: https://oneinstack.com/faq/auto
Use systemd for nginx, php-fpm, apache, redis, pureftpd, and so on
Apache2.4 use fcgi
Add PHP7.3
Add PHP extensions, include sourceguardian,phalcon, and so on
Add qiniu backup
Add JDK11
Add ip6tables and iptables-persistent
Add nginx waf
Add codeigniter nginx rewrite
Support Amazon Linux 2, Fedora, Deepin 15
Update version