Add Tramp methods dockercp and podmancp

* doc/misc/tramp.texi (External methods):  Add dockercp and podmancp.

* etc/NEWS: Add Tramp methods "dockercp" and "podmancp".

* lisp/net/tramp.el (tramp-handle-make-process):
* lisp/net/tramp-adb.el (tramp-adb-maybe-open-connection):
* lisp/net/tramp-sh.el (tramp-do-copy-or-rename-file-out-of-band)
(tramp-maybe-open-connection):
* lisp/net/tramp-sshfs.el (tramp-sshfs-handle-process-file)
(tramp-sshfs-maybe-open-connection):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-send-command): Adapt
`tramp-expand-args' calls.

* lisp/net/tramp-container.el (tramp-dockercp-method)
(tramp-podmancp-method): New defconst.
(tramp-methods) <dockercp, podmancp>: Add new methods.
(tramp-container--completion-function): Adapt docstring.  Use it
for "dockercp" and "podmancp" completion.

* lisp/net/tramp.el (tramp-get-remote-tmpdir):
* lisp/net/tramp-gvfs.el (tramp-gvfs-maybe-open-connection):
* lisp/net/tramp-sh.el (tramp-maybe-open-connection): Use a default
value with `tramp-get-method-parameter'.

* lisp/net/tramp-sh.el (tramp-methods) <nc>: Add `tramp-copy-file-name'.
(tramp-default-copy-file-name): New defconst.
(tramp-make-copy-file-name): Rename from
`tramp-make-copy-program-file-name'.  Use method parameter
`tramp-copy-file-name'.  (Bug#69085)
(tramp-do-copy-or-rename-file-out-of-band): Adapt callees.

* lisp/net/tramp.el (tramp-methods): Adapt docstring.
(tramp-get-method-parameter, tramp-expand-args): New optional
argument DEFAULT.

* test/lisp/net/tramp-tests.el (tramp--test-container-p): Adapt.
(tramp--test-container-oob-p): New defun.
(tramp-test17-dired-with-wildcards, tramp-test35-remote-path)
(tramp-test41-special-characters): Use it.
(tramp--test-set-ert-test-documentation): Use `split-string'.

1 files changed, 14 insertions, 0 deletions

diff --git a/doc/misc/tramp.texi b/doc/misc/tramp.texi
index affd760730b..6d4654f1a8a 100644
--- a/doc/misc/tramp.texi
+++ b/doc/misc/tramp.texi
@@ -1059,6 +1059,20 @@ session.
 
 These methods support the @samp{-P} argument.
 
+@item @option{dockercp}
+@item @option{podmancp}
+@cindex method @option{dockercp}
+@cindex @option{dockercp} method
+@cindex method @option{podmancp}
+@cindex @option{podmancp} method
+
+These methods are similar to @option{docker} or @option{podman}, but
+they use the command @command{docker cp} or @command{podman cp} for
+transferring large files.
+
+These copy commands do not support file globs, and they ignore a user
+name.
+
 @item @option{fcp}
 @cindex method @option{fcp}
 @cindex @option{fcp} method