Merge changes made in Gnus trunk.

nnimap.el: Implement partial IMAP article fetch.
nnimap.el: Have nnimap not update the infos if it can't get info from the server.
Implement functions for showing the complete articles.
gnus-int.el (gnus-open-server): Don't query whether to go offline -- just do it.
gnus-art.el (gnus-mime-delete-part): Fix plural for "byte" when there isn't a single byte.
nndoc.el (nndoc-type-alist): Move mime-parts after mbox.  Suggested by Jay Berkenbilt.
mm-decode.el (mm-save-part): Allow saving to other directories the normal Emacs way.
gnus-html.el (gnus-html-rescale-image): Use our defalias gnus-window-inside-pixel-edges.
gnus-srvr.el (gnus-server-copy-server): Add documentation.
gnus.texi (Using IMAP): Document the new nnimap.
nnimap.el (nnimap-wait-for-response): Search further when we're not using streaming.
gnus-int.el (gnus-check-server): Say what the error was when opening failed.
nnheader.el (nnheader-get-report-string): New function.
gnus-int.el (gnus-check-server): Use report-string.
nnimap.el (nnimap-open-connection): Add more error reporting when nnimap fails early.
gnus-start.el (gnus-get-unread-articles): Don't try to open failed servers twice.
nnimap.el (nnimap-wait-for-response): Reversed logic in the nnimap-streaming test.
gnus-art.el: Removed CTAN button stuff, which I don't think is very relevant any more.
Remove NoCeM support, since nobody seems to use it any more.
Remove earcon and gnus-audio.
gnus.el (gnus): Silence gnus-load message.
gnus-group.el (gnus-read-ephemeral-bug-group): Add the bug email address to the To list for easier response.
gnus.texi (Connecting to an IMAP Server): Show how to use as primary method instead of secondary.

lisp/gnus/gnus-group.el

@@ -2418,6 +2418,14 @@ the bug number, and browsing the URL must return mbox output."
   (let ((tmpfile (mm-make-temp-file "gnus-temp-group-")))
     (with-temp-file tmpfile
       (url-insert-file-contents (format mbox-url number))
+      (goto-char (point-min))
+      ;; Add the debbugs address so that we can respond to reports easily.
+      (while (re-search-forward "^To: " nil t)
+	(end-of-line)
+	(insert (format ", %s@%s" number
+			(replace-regexp-in-string
+			 "/.*$" ""
+			 (replace-regexp-in-string "^http://" "" mbox-url)))))
       (write-region (point-min) (point-max) tmpfile)
       (gnus-group-read-ephemeral-group
        "gnus-read-ephemeral-bug"
@@ -3946,14 +3954,6 @@ re-scanning.  If ARG is non-nil and not a number, this will force
     (unless gnus-slave
       (gnus-master-read-slave-newsrc))
 
-    ;; We might read in new NoCeM messages here.
-    (when (and gnus-use-nocem
-	       (or (and (numberp gnus-use-nocem)
-			(numberp arg)
-			(>= arg gnus-use-nocem))
-		   (not arg)))
-      (gnus-nocem-scan-groups))
-
     (gnus-get-unread-articles arg)
 
     ;; If the user wants it, we scan for new groups.