GUAC-240: Flush to JPEG if dirty rect is hot.
GUAC-240: Flush to JPEG if dirty rect is hot.

flangelo/guacamole-server,apache/guacamole-server,apache/guacamole-server,mike-jumper/incubator-guacamole-server,glyptodon/guacamole-server,massuda-marcelo/guacamole-server,glyptodon/guacamole-server,wcypierre/guacamole-server,massuda-marcelo/guacamole-server,massuda-marcelo/guacamole-server,glyptodon/guacamole-server,flangelo/guacamole-server,massuda-marcelo/guacamole-server,wcypierre/guacamole-server,mike-jumper/incubator-guacamole-server,apache/guacamole-server,mike-jumper/incubator-guacamole-server,flangelo/guacamole-server,wcypierre/guacamole-server,flangelo/guacamole-server,mike-jumper/incubator-guacamole-server,wcypierre/guacamole-server