GUAC-1389: Document internal stream management functions. Fix semantics of stream closure.
GUAC-1389: Document internal stream management functions. Fix semantics of stream closure.

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