Changes during CCCE development

Changes:

• conserver.service is now reloadable
• logrotate is configured for main logfile
• internal log rotation is enabled for per-IOC logfiles, compression is done via logrotate
• consoles are only up while someone is connected
• per-IOC logfiles contain the username of the connected user
• support for per-console configuration files
  • just drop a .cf file into /etc/conserver/