rsclient/cmd doesn't work on LSDos 6.3.1

[ngtwolf]

Client works on LDos 5.3, but not 6.3.1. It just freezes on the newer dos.

[ngtwolf]

Just a note that the documentation does technically say 'model 3' and not model 4, so it's possible this isn't really an issue. But since this does work on a model 4 (and apparently a model 1, as tested by john wiggins on facebook), maybe it's more a feature request than an issue.