Fix coding system for Tramp on OS X.

* lisp/net/tramp-compat.el: Require ucs-normalize.

* lisp/net/tramp-sh.el (tramp-open-connection-setup-interactive-shell):
Set coding system to `utf-8-hfs' for Mac OS X.

* test/automated/tramp-tests.el (tramp-test29-vc-registered):
Flush directory properties when needed.
(tramp--test-utf8): Include Chinese file name, again.

lisp/net/tramp-compat.el

@@ -56,6 +56,8 @@
   (require 'custom)
   (require 'format-spec)
   (require 'shell)
+  ;; Introduced in Emacs 23.2.
+  (require 'ucs-normalize nil 'noerror)
 
   (require 'trampver)
   (require 'tramp-loaddefs)

lisp/net/tramp-sh.el

@@ -4214,10 +4214,8 @@ process to set up.  VEC specifies the connection."
 		      (cons 'undecided 'undecided)))
 	      cs-decode cs-encode)
 	  (when (symbolp cs) (setq cs (cons cs cs)))
-	  (setq cs-decode (car cs))
-	  (setq cs-encode (cdr cs))
-	  (unless cs-decode (setq cs-decode 'undecided))
-	  (unless cs-encode (setq cs-encode 'undecided))
+	  (setq cs-decode (or (car cs) 'undecided)
+                cs-encode (or (cdr cs) 'undecided))
 	  (setq cs-encode
 		(tramp-compat-coding-system-change-eol-conversion
 		 cs-encode
@@ -4229,7 +4227,13 @@ process to set up.  VEC specifies the connection."
 	  (when (search-forward "\r" nil t)
 	    (setq cs-decode (tramp-compat-coding-system-change-eol-conversion
 			     cs-decode 'dos)))
-	  (tramp-compat-funcall
+          ;; Special setting for Mac OS X.
+          (when (and (string-match
+                      "^Darwin" (tramp-get-connection-property vec "uname" ""))
+                     (memq 'utf-8-hfs (coding-system-list)))
+            (setq cs-decode 'utf-8-hfs
+                  cs-encode 'utf-8-hfs))
+          (tramp-compat-funcall
 	   'set-buffer-process-coding-system cs-decode cs-encode)
 	  (tramp-message
 	   vec 5 "Setting coding system to `%s' and `%s'" cs-decode cs-encode))

test/automated/tramp-tests.el

@@ -1658,6 +1658,10 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
 	       (vc-register
 		nil (list (car vc-handled-backends)
 			  (list (file-name-nondirectory tmp-name2))))))
+	    ;; vc-git uses an own process sentinel, Tramp's sentinel
+	    ;; for flushing the cache isn't used.
+	    (with-parsed-tramp-file-name tmp-name1 nil
+	      (tramp-flush-directory-property v localname))
 	    (should (vc-registered (file-name-nondirectory tmp-name2)))))
 
       ;; Cleanup.
@@ -2044,8 +2048,7 @@ Use the `ls' command."
      (unless (tramp--test-hpux-p) "Γυρίστε το Γαλαξία με Ώτο Στοπ")
      (unless (or (tramp--test-hpux-p) (tramp--test-darwin-p))
        "أصبح بوسعك الآن تنزيل نسخة كاملة من موسوعة ويكيبيديا العربية لتصفحها بلا اتصال بالإنترنت")
-     (unless (tramp--test-darwin-p)
-       "银河系漫游指南系列")
+     "银河系漫游指南系列"
      "Автостопом по гала́ктике")))
 
 (ert-deftest tramp-test32-utf8 ()