[server] remove the &optional retry shitty at lisp-chat-server:main
[server] remove the &optional retry shitty at lisp-chat-server:main

This is just awful. This is not the job of this program.
A monitor and supervisor should handle that. Removing this cancer
feature as well the enforcing (again) to use a SBCL-specific
thing as sb-ext package.

ryukinix/lisp-chat,ryukinix/lisp-chat