bug#51360: 29.0.50; variable `server-name' initialized too late for use in init file

[Gregory Heytings]

> Warning (initialization): An error occurred while loading 
> ´/home/grfz/.config/emacs/init.el´:
>
> Symbol's value as variable is void: server-name

You should (require 'server) before referring to server-name.  None of the 
defcustoms in server.el are autoloaded.