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/templates/freshclam.mustache

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+# WordOps ClamAV freshclam script
+# script path after installation /opt/freshcham.sh
+
+if [ -x /etc/init.d/clamav-freshclam ]; then
+{
+    /etc/init.d/clamav-freshclam stop
+    freshclam
+    /etc/init.d/clamav-freshclam start
+} >> /var/log/wo/clamav.log 2>&1
+fi