Mark server-kill-new-buffers as documented in the manual.

Fix typos.

etc/NEWS

@@ -270,14 +270,15 @@ the kill ring, e.g. to produce a table of contents.
 
 ** Changes to Emacs Server 
 
-*** There new option `server-kill-new-buffers' specifies what to do
++++
+*** The new option `server-kill-new-buffers' specifies what to do
 with buffers when done with them.  If non-nil, the default, buffers
 are killed, unless they were already present before visiting them with
 Emacs Server.  If nil, `server-temp-file-regexp' specifies which
 buffers to kill, as before.
 
 Please note that only buffers are killed that still have a client,
-i.e. buffers visited which `emacsclient --no-wait' are never killed in
+i.e. buffers visited with `emacsclient --no-wait' are never killed in
 this way.
 
 ** Changes to Show Paren mode.