Sync with Tramp 2.2.8.

* tramp.texi (External packages): Use `non-essential'.
* trampver.texi: Update release number.

doc/misc/ChangeLog

+2013-10-02  Michael Albinus  <michael.albinus@gmx.de>
+
+	Sync with Tramp 2.2.8.
+
+	* tramp.texi (External packages): Use `non-essential'.
+	* trampver.texi: Update release number.
+
 2013-09-14  Glenn Morris  <rgm@gnu.org>
 
 	* eshell.texi: Markup fixes.

doc/misc/tramp.texi

@@ -3738,14 +3738,13 @@ therefore the last input character you have typed.  If this is
 still in filename completion, and it does not connect to the possible
 remote host @option{ssh}.
 
-@vindex tramp-completion-mode
 External packages, which use other characters for completing filenames
 in the minibuffer, must signal this to @value{tramp}.  For this case,
-the variable @code{tramp-completion-mode} can be bound temporarily to
+the variable @code{non-essential} can be bound temporarily to
 a non-@code{nil} value.
 
 @lisp
-(let ((tramp-completion-mode t))
+(let ((non-essential t))
   ...)
 @end lisp
 

doc/misc/trampver.texi

@@ -8,7 +8,7 @@
 @c In the Tramp CVS, the version number is auto-frobbed from
 @c configure.ac, so you should edit that file and run
 @c "autoconf && ./configure" to change the version number.
-@set trampver 2.2.8-pre
+@set trampver 2.2.8
 
 @c Other flags from configuration
 @set instprefix /usr/local