guacamole-server is marked for autoremoval from testing

[Debian testing autoremoval watch]

guacamole-server 0.8.3-2 is marked for autoremoval from testing on 2016-07-28

It is affected by these RC bugs:
827300: guacamole-server: FTBFS: guac_handlers.c:398:13: error: 
channel_change_pty_size is deprecated