Initial commit of a log capture and reporting feature

This adds a new section to the admin panel called "Activity", that
supplies charts, graphs and details about messages entering and leaving
the host.

A new daemon captures details of system mail activity by monitoring
the /var/log/mail.log file, summarizing it into a sqllite database
that's kept in user-data.

ehdd/postinstall.sh

@@ -14,6 +14,7 @@ if [ -e "$EHDD_IMG" ]; then
         systemctl disable php7.2-fpm
         systemctl disable mailinabox
         systemctl disable fail2ban
+        systemctl disable miabldap-capture
         #systemctl disable nsd
         [ -x /usr/sbin/slapd ] && systemctl disable slapd
 

ehdd/startup.sh

@@ -12,5 +12,6 @@ if [ -s /etc/mailinabox.conf ]; then
     systemctl link -f $(pwd)/conf/mailinabox.service
     systemctl start fail2ban
     systemctl restart mailinabox
+    systemctl start miabldap-capture
 fi