Revert previous patch

(let ((url-news-server "news.gmane.org"))
  (url-retrieve-synchronously  "news:87y4p9y2cq.fsf@violet.siamics.net"))

works fine for me

2 files changed, 1 insertions, 7 deletions

diff --git a/lisp/gnus/ChangeLog b/lisp/gnus/ChangeLog
index df331984865..b9ae796782d 100644
--- a/lisp/gnus/ChangeLog
+++ b/lisp/gnus/ChangeLog
@@ -1,8 +1,3 @@
-2015-02-14  Ivan Shmakov  <ivan@siamics.net>
-
-        * nntp.el (nntp-open-server): Set variables in the correct buffer
-        (bug#19583).
-
 2015-02-14  Lars Ingebrigtsen  <larsi@gnus.org>
 
         * mm-decode.el (mm-head-p): New function.
diff --git a/lisp/gnus/nntp.el b/lisp/gnus/nntp.el
index a86f45e8bf3..0891dba0387 100644
--- a/lisp/gnus/nntp.el
+++ b/lisp/gnus/nntp.el
@@ -1066,8 +1066,7 @@ command whose response triggered the error."
       (setq defs (cons (list 'nntp-port-number (car defs)) (cdr defs))))
     (unless (assq 'nntp-address defs)
       (setq defs (append defs (list (list 'nntp-address server)))))
-    (with-current-buffer nntp-server-buffer
-      (nnoo-change-server 'nntp server defs))
+    (nnoo-change-server 'nntp server defs)
     (if connectionless
         t
       (or (nntp-find-connection nntp-server-buffer)