[CM] slime and rts

[Rick Taube]

i can get rts to run under slime in linux/sbcl by setting  
swank:*communication-style* to :fd-handler in my ~/.swank.lisp file:
(setf swank:*communication-style* ':fd-handler)
the default behavior is :spawn, which apparently spawns threads in  
sbcl that must conflict with the posix c thread that rts starts somehow.

if you send me bugs please be sure you are running directly in a  
terminal -- getting emacs and slime involved on top of everything  
else makes it impossible for me to know what is going wrong.