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

install

@@ -494,7 +494,7 @@ wo_upgrade_nginx() {
         # install new nginx package
         if [ -n "$CHECK_NGINX_EE" ]; then
             if [ -x /usr/local/bin/wo ]; then
-                [ -f /etc/apt/preferences.d/nginx-block ] && { mv /etc/apt/preferences.d/nginx-block .;}
+                [ -f /etc/apt/preferences.d/nginx-block ] && { mv /etc/apt/preferences.d/nginx-block /var/lib/wo/tmp/nginx-block; }
                 # stop nginx
                 service nginx stop
                 # remove previous package
@@ -545,7 +545,7 @@ wo_upgrade_nginx() {
             systemctl stop nginx
             systemctl start nginx
         fi
-        [ -f ./nginx-block ] && { mv nginx-block /etc/apt/preferences.d/nginx-block ;}
+        [ -f /var/lib/wo/tmp/nginx-block ] && { mv /var/lib/wo/tmp/nginx-block /etc/apt/preferences.d/nginx-block; }
 
     } \
         >> "$wo_install_log" 2>&1
@@ -655,7 +655,6 @@ wo_tweak_kernel() {
         # apply sysctl tweaks
         sysctl -eq -p /etc/sysctl.d/60-wo-tweaks.conf
     fi
-
 }
 
 wo_systemd_tweak() {
@@ -678,6 +677,37 @@ wo_systemd_tweak() {
 
 }
 
+wo_domain_suffix() {
+    curl -sL https://raw.githubusercontent.com/publicsuffix/list/master/public_suffix_list.dat | sed '/^\/\//d' | sed '/^$/d' | sed 's/^\s+//g' > /var/lib/wo/public_suffix_list.dat
+}
+
+wo_mariadb_tweak() {
+    # increase mariadb open_files_limit
+    {
+        if [ -d /etc/systemd/system/mariadb.service.d ] && [ ! -f /etc/systemd/system/mariadb.service.d/limits.conf ]; then
+            echo -e '[Service]\nLimitNOFILE=500000' > /etc/systemd/system/mariadb.service.d/limits.conf
+            systemctl daemon-reload
+            service mysql restart
+        fi
+    } >> /var/log/wo/install.log 2>&1
+}
+
+wo_nginx_tweak() {
+    # increase nginx open_files_limit
+    {
+        if [ -x /usr/sbin/nginx ]; then
+            if [ ! -d /etc/systemd/system/nginx.service.d ]; then
+                mkdir -p /etc/systemd/system/nginx.service.d
+                if [ ! -f /etc/systemd/system/nginx.service.d/limits.conf ]; then
+                    echo -e '[Service]\nLimitNOFILE=500000' > /etc/systemd/system/nginx.service.d/limits.conf
+                    systemctl daemon-reload
+                    nginx -t && service nginx restart
+                fi
+            fi
+        fi
+    } >> /var/log/wo/install.log 2>&1
+}
+
 wo_clean() {
     rm -rf /usr/local/lib/python3.*/dist-packages/wo-*
 }
@@ -794,6 +824,8 @@ else
                 wo_lib_echo "Adding systemd service tweak" | tee -ai $wo_install_log
                 wo_systemd_tweak | tee -ai $wo_install_log
             fi
+            wo_nginx_tweak | tee -ai $wo_install_log
+            wo_mysql_tweak | tee -ai $wo_install_log
             wo_lib_echo "Running post-install steps " | tee -ai $wo_install_log
             wo_update_wp_cli | tee -ai $wo_install_log
         else
@@ -836,6 +868,8 @@ else
                     wo_lib_echo "Adding systemd service tweak" | tee -ai $wo_install_log
                     wo_systemd_tweak | tee -ai $wo_install_log
                 fi
+                wo_nginx_tweak | tee -ai $wo_install_log
+                wo_mysql_tweak | tee -ai $wo_install_log
                 wo_lib_echo "Running post-install steps " | tee -ai $wo_install_log
                 wo_git_init | tee -ai $wo_install_log
                 wo_update_wp_cli | tee -ai $wo_install_log