GUACAMOLE-313: Remove code handling Unicode codepoints which cannot be represented by X11 keysyms.
GUACAMOLE-313: Remove code handling Unicode codepoints which cannot be represented by X11 keysyms.

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