Define -print-nonl client command

Define -print-nonl client command

* lib-src/emacsclient.c (main): Handle -print-nonl command.

* lisp/server.el (server-msg-size): New constant.
(server-reply-print): New function.
(server-eval-and-print): Use it.
(server-eval-at): Use server-quote-arg and server-unquote-arg.
Handle -print-nonl.