Several new features

- cht.sh stack : linux online cheatsheet. Usage : `cheat <command>`. Example for tar : `cheat tar`
- ClamAV anti-virus with weekly cronjob to update signatures database
- Internal function to add daily cronjobs
- Additional comment to detect previous configuration tuning (MariaDB & Redis)
- Domain/Subdomain detection based on public domain suffixes list
- Increase Nginx & MariaDB systemd open_files limits
- Cronjob to update Cloudflare IPs list

wo/cli/plugins/stack_upgrade.py

@@ -64,7 +64,7 @@ class WOStackUpgradeController(CementBaseController):
         packages = []
         nginx_packages = []
         empty_packages = []
-        pargs = pargs = self.app.pargs
+        pargs = self.app.pargs
 
         if ((not pargs.web) and (not pargs.nginx) and
             (not pargs.php) and (not pargs.php73) and