GUACAMOLE-931: Merge FreeRDP user home directory safety checks.
GUACAMOLE-931: Merge FreeRDP user home directory safety checks.


mike-jumper/incubator-guacamole-server,mike-jumper/incubator-guacamole-server,apache/guacamole-server,mike-jumper/incubator-guacamole-server,mike-jumper/incubator-guacamole-server,glyptodon/guacamole-server,apache/guacamole-server,glyptodon/guacamole-server,apache/guacamole-server,glyptodon/guacamole-server