[Apache] logging images with external referrer

<IfModule mod_setenvif.c> SetEnvIfNoCase Request_URI "\.jpg$" no-log env-image SetEnvIfNoCase Request_URI "\.jpeg$" no-log env-image SetEnvIfNoCase Request_URI "\.gif$" no-log env-image SetEnvIfNoCase Request_URI "\.png$" no-log env-image </IfModule> <VirtualHost *:80> DocumentRoot…