Sync with Tramp 2.5.0-pre

* doc/misc/tramp.texi:  Protext Tramp x.y and Emacs x.y by @w{}.
(GVFS-based methods): Move "GNOME Online Accounts" index.
(Customizing Methods, Android shell setup, File name completion)
(Frequently Asked Questions): Fix typos.

* doc/misc/trampver.texi: Change version to "2.5.0-pre".

* lisp/net/trampver.el: Change version to "2.5.0-pre".
(inhibit-message): Don't declare.

* lisp/net/tramp.el: Bump version to 2.5.0-pre.  Require Emacs 25.1.
(tramp-debug-message): Simplify.
(tramp-message): Don't use `tramp-message-show-message'.
(tramp-with-demoted-errors, with-parsed-tramp-file-name)
(with-tramp-file-property, with-tramp-connection-property):
Adapt `declare' form.
(with-tramp-progress-reporter): Suppress progress reporter when
noninteractive.
(tramp-completion-mode, tramp-completion-mode-p): Remove.

* lisp/net/tramp-compat.el (tramp-compat-process-running-p)
(format-message): Remove compatibility code.
(tramp-compat-directory-name-p)
(tramp-compat-tramp-file-name-slots): Remove.

* lisp/net/tramp.el (tramp-debug-message, tramp-message)
(tramp-backtrace, tramp-error, tramp-error-with-buffer)
(tramp-user-error, tramp-with-demoted-errors)
(tramp-signal-hook-function):
* lisp/net/tramp-compat.el (tramp-compat-funcall)
* lisp/net/tramp-gvfs.el (tramp-dbus-function):
Add `tramp-suppress-trace' property.

* lisp/net/tramp.el (tramp-get-method-parameter)
(tramp-dissect-file-name, tramp-error, tramp-error-with-buffer)
(tramp-user-error, with-parsed-tramp-file-name)
(with-tramp-progress-reporter, tramp-file-name-handler)
(tramp-completion-file-name-handler, tramp-autoload-file-name-handler)
(tramp-register-file-name-handlers, tramp-connectable-p)
(tramp-handle-file-modes, tramp-handle-file-regular-p)
(tramp-handle-file-truename, tramp-handle-insert-directory)
(tramp-handle-load, tramp-set-file-uid-gid):
* lisp/net/tramp-adb.el (tramp-adb-file-name-handler)
(tramp-adb-handle-file-truename, tramp-adb-handle-copy-file)
(tramp-adb-handle-rename-file):
* lisp/net/tramp-archive.el (with-parsed-tramp-archive-file-name):
* lisp/net/tramp-cache.el (tramp-get-file-property, tramp-cache-print):
* lisp/net/tramp-compat.el (tramp-compat-process-running-p)
(tramp-compat-exec-path):
* lisp/net/tramp-gvfs.el (tramp-gvfs-file-name-handler)
(tramp-gvfs-dbus-byte-array-to-string)
(tramp-gvfs-do-copy-or-rename-file):
* lisp/net/tramp-rclone.el (tramp-rclone-file-name-handler)
(tramp-rclone-do-copy-or-rename-file):
* lisp/net/tramp-sh.el (tramp-sh-handle-file-truename)
(tramp-sh-handle-copy-directory, tramp-do-copy-or-rename-file)
(tramp-sh-handle-insert-directory, tramp-sh-file-name-handler)
(tramp-maybe-open-connection):
* lisp/net/tramp-smb.el (tramp-smb-file-name-handler)
(tramp-smb-handle-copy-file, tramp-smb-handle-copy-directory)
(tramp-smb-handle-copy-file, tramp-smb-handle-insert-directory)
(tramp-smb-handle-rename-file, tramp-smb-maybe-open-connection):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-file-name-handler)
(tramp-sudoedit-do-copy-or-rename-file)
(tramp-sudoedit-handle-file-truename):
Use `if-let', `when-let', `directory-name-p', `inhibit-message',
`non-essential and `cl-struct-slot-info'.  Don't use `seconds-to-time'.

* test/lisp/net/tramp-archive-tests.el (tramp-message-show-message):
Don't set.

* test/lisp/net/tramp-tests.el (inhibit-message): Don't declare.
(tramp-message-show-message): Don't set.
(tramp-test06-directory-file-name): Use `non-essential'.
(tramp-test10-write-region): Use `inhibit-message'.
(tramp-test36-vc-registered): No special handling for old Emacsen.
(tramp--test-emacs25-p): Remove.
(tramp-test45-unload): Special case of `tramp-completion-mode'.

lisp/net/tramp-cache.el

@@ -130,13 +130,8 @@ Returns DEFAULT if not set."
 	     (or (null remote-file-name-inhibit-cache)
 		 (and (integerp remote-file-name-inhibit-cache)
 		      (time-less-p
-		       ;; `current-time' can be nil once we get rid of Emacs 24.
-		       (current-time)
-		       (time-add
-			(car value)
-		       ;; `seconds-to-time' can be removed once we get
-		       ;; rid of Emacs 24.
-			(seconds-to-time remote-file-name-inhibit-cache))))
+		       nil
+		       (time-add (car value) remote-file-name-inhibit-cache)))
 		 (and (consp remote-file-name-inhibit-cache)
 		      (time-less-p
 		       remote-file-name-inhibit-cache (car value)))))
@@ -386,20 +381,15 @@ used to cache connection properties of the local machine."
       (maphash
        (lambda (key value)
 	 ;; Remove text properties from KEY and VALUE.
-	 ;; `cl-struct-slot-*' functions exist since Emacs 25 only; we
-	 ;; ignore errors.
 	 (when (tramp-file-name-p key)
-	   ;; (dolist
-	   ;;     (slot
-	   ;; 	(mapcar #'car (cdr (cl-struct-slot-info 'tramp-file-name))))
-	   ;;   (when (stringp (cl-struct-slot-value 'tramp-file-name slot key))
-	   ;;     (setf (cl-struct-slot-value 'tramp-file-name slot key)
-	   ;; 	     (substring-no-properties
-	   ;; 	      (cl-struct-slot-value 'tramp-file-name slot key))))))
-	   (dotimes (i (length key))
-	     (when (stringp (elt key i))
-	       (setf (elt key i) (substring-no-properties (elt key i))))))
-	 (when (stringp key)
+           (dolist
+               (slot
+                (mapcar #'car (cdr (cl-struct-slot-info 'tramp-file-name))))
+             (when (stringp (cl-struct-slot-value 'tramp-file-name slot key))
+               (setf (cl-struct-slot-value 'tramp-file-name slot key)
+                     (substring-no-properties
+                      (cl-struct-slot-value 'tramp-file-name slot key))))))
+         (when (stringp key)
 	   (setq key (substring-no-properties key)))
 	 (when (stringp value)
 	   (setq value (substring-no-properties value)))