Sync with Tramp 2.3.4-pre

Sync with Tramp 2.3.4-pre

* doc/misc/trampver.texi: Change version to "2.3.4-pre

* lisp/net/tramp.el (tramp-mode, tramp-verbose)
(tramp-backup-directory-alist, tramp-auto-save-directory)
(tramp-encoding-shell, tramp-encoding-command-switch)
(tramp-encoding-command-interactive, tramp-default-method)
(tramp-default-method-alist, tramp-default-user)
(tramp-default-user-alist, tramp-default-host)
(tramp-default-host-alist, tramp-default-proxies-alist)
(tramp-save-ad-hoc-proxies, tramp-restricted-shell-hosts-alist)
(tramp-local-end-of-line, tramp-rsh-end-of-line)
(tramp-login-prompt-regexp, tramp-shell-prompt-pattern)
(tramp-password-prompt-regexp, tramp-wrong-passwd-regexp)
(tramp-yesno-prompt-regexp, tramp-yn-prompt-regexp)
(tramp-terminal-prompt-regexp)
(tramp-operation-not-permitted-regexp, tramp-copy-failed-regexp)
(tramp-process-alive-regexp, tramp-chunksize)
(tramp-process-connection-type, tramp-connection-timeout)
(tramp-connection-min-time-diff)
(tramp-completion-reread-directory-timeout):
* lisp/net/tramp-adb.el (tramp-adb-program)
(tramp-adb-connect-if-not-connected, tramp-adb-prompt):
* lisp/net/tramp-cache.el (tramp-connection-properties)
(tramp-persistency-file-name):
* lisp/net/tramp-gvfs.el (tramp-gvfs-methods)
(tramp-gvfs-zeroconf-domain, tramp-bluez-discover-devices-timeout):
* lisp/net/tramp-sh.el (tramp-inline-compress-start-size)
(tramp-copy-size-limit, tramp-terminal-type)
(tramp-histfile-override, tramp-use-ssh-controlmaster-options)
(tramp-remote-path, tramp-remote-process-environment)
(tramp-sh-extra-args):
* lisp/net/tramp-smb.el (tramp-smb-program, tramp-smb-acl-program)
(tramp-smb-conf, tramp-smb-winexe-program)
(tramp-smb-winexe-shell-command)
(tramp-smb-winexe-shell-command-switch):
Dont't require 'tramp.  (Bug#31558)

* lisp/net/tramp.el (tramp-accept-process-output):
* lisp/net/tramp-adb.el (tramp-adb-handle-start-file-process):
* lisp/net/tramp-sh.el (tramp-do-copy-or-rename-file-out-of-band)
(tramp-sh-handle-start-file-process):
* lisp/net/tramp-smb.el (tramp-smb-handle-copy-directory)
(tramp-smb-handle-file-acl, tramp-smb-handle-process-file)
(tramp-smb-handle-set-file-acl)
(tramp-smb-handle-start-file-process): Suppress timers.

* lisp/net/tramp-adb.el (tramp-adb-handle-write-region):
* lisp/net/tramp-gvfs.el (tramp-gvfs-handle-write-region):
* lisp/net/tramp-sh.el (tramp-sh-handle-write-region):
* lisp/net/tramp-smb.el (tramp-smb-handle-write-region):
Write proper message.

* lisp/net/tramp-cmds.el (tramp-change-syntax):
Use `customize-set-variable'.

* lisp/net/tramp-sh.el (tramp-open-connection-setup-interactive-shell):
Ensure proper EOL handling for Darwin.
(tramp-find-inline-compress): Improve command quoting for w32.
Reported by Chris Zheng <chriszheng99@gmail.com>.
(tramp-open-connection-setup-interactive-shell): Wrap both echo
calls in parentheses, in order to avoid double prompt.

* lisp/net/tramp-smb.el (tramp-smb-errors):
Add "NT_STATUS_RESOURCE_NAME_NOT_FOUND".

* lisp/net/tramp.el (tramp-default-user-alist)
(tramp-default-host-alist): Fix docstring.
(tramp-dissect-file-name): Adapt docstring.  (Bug#30904)
(tramp-make-tramp-file-name): Check, that method is
not empty.  (Bug#30038)
(tramp-message-show-message): Change default.

* lisp/net/trampver.el: Change version to "2.3.4-pre".

* test/lisp/net/tramp-tests.el (ert-x): Require it.
(tramp-test10-write-region): Extend test.
(tramp--test-emacs27-p, tramp--test-windows-nt): New defuns.
(tramp-test11-copy-file, tramp-test12-rename-file)
(tramp-test21-file-links, tramp-test24-file-acl)
(tramp-test25-file-selinux, tramp--test-check-files): Use them.
(tramp-test21-file-links): Do not call `make-symbolic-link' on w32.
Fix file name quoting test.
(tramp-test32-environment-variables-and-port-numbers):
Adapt check for systems which do not support "echo -n".  (Bug#29712)
(tramp-test36-find-backup-file-name): Call also
`convert-standard-filename' due to w32.
(tramp-test41-asynchronous-requests):
Use $REMOTE_PARALLEL_PROCESSES.  Flush cache prior file operations.
(tramp-test42-auto-load, tramp-test42-delay-load)
(tramp-test42-recursive-load, tramp-test42-remote-load-path):
Quote command due to w32.