Allow Tramp to mirror traces to a file

Allow Tramp to mirror traces to a file

* doc/misc/tramp.texi (Traces and Profiles): Add `tramp-debug-to-file'.

* lisp/net/tramp-adb.el (tramp-adb-parse-device-names)
(tramp-adb-get-device):
* lisp/net/tramp-cmds.el (tramp-rename-files):
* lisp/net/tramp-gvfs.el (tramp-gvfs-monitor-process-filter)
(tramp-gvfs-handler-volumeadded-volumeremoved)
(tramp-get-media-devices):
* lisp/net/tramp-sh.el (tramp-sh-handle-file-notify-add-watch)
(tramp-sh-gio-monitor-process-filter)
(tramp-sh-gvfs-monitor-dir-process-filter)
(tramp-sh-inotifywait-process-filter, tramp-maybe-send-script)
(tramp-find-inline-encoding):
* lisp/net/tramp-smb.el (tramp-smb-handle-copy-directory)
(tramp-smb-handle-file-acl, tramp-smb-handle-set-file-acl):
Use `tramp-compat-string-replace'.

* lisp/net/tramp-compat.el (tramp-compat-string-replace): New defalias.

* lisp/net/tramp.el (tramp-debug-to-file): New defcustom.
(tramp-get-debug-buffer): Simplify.
(tramp-get-debug-file-name): New defun.
(tramp-debug-message): Write debug file if indicated.