[SECURITY] Fedora 20 Update: guacamole-server-0.8.4-3.fc20

Guacamole is an HTML5 remote desktop gateway. Guacamole provides access to desktop environments using remote desktop prot ocols like VNC and RDP. A centralized server acts as a tunnel and proxy, allowing access to multiple desktops through a web browser. No browser plugins are needed, and no client software needs to be installed . The client requires nothing more than a web browser supporting HTML5 and AJAX. The main web application is provided by the “guacamole-client” package.