Morka handling of multi-hops in Tramp more consistent

Morka handling of multi-hops in Tramp more consistent

* lisp/net/tramp.el (tramp-make-tramp-file-name): Adapt argument list.
Add hops to `tramp-default-proxies-alist'.
(tramp-find-foreign-file-name-handler): Adapt argument list.
(tramp-handle-abbreviate-file-name): Abbreviate multi-hops.
(tramp-handle-file-remote-p): Adapt handling of hops.
(tramp-add-hops): New defun.
(tramp-compute-multi-hops): Use it.

* lisp/net/tramp.el (tramp-make-tramp-hop-name, tramp-get-buffer)
(tramp-file-name-handler, tramp-handle-file-truename)
(tramp-handle-insert-file-contents, tramp-local-host-p)
(tramp-read-passwd, tramp-clear-passwd):
* lisp/net/tramp-archive.el (tramp-archive-dissect-file-name)
(tramp-archive-gvfs-file-name):
* lisp/net/tramp-cache.el (tramp-get-hash-table):
* lisp/net/tramp-sh.el (tramp-sh-handle-file-truename)
(tramp-sh-handle-make-process, tramp-sh-handle-process-file)
(tramp-sh-file-name-handler-p, tramp-get-remote-path):
* lisp/net/tramp-sshfs.el (tramp-sshfs-handle-process-file):
* lisp/net/tramp-sudoedit.el (tramp-sudoedit-handle-file-truename):
Adapt callees.

* test/lisp/net/tramp-tests.el (tramp-test02-file-name-dissect)
(tramp-test02-file-name-dissect-simplified)
(tramp-test02-file-name-dissect-separate)
(tramp-test07-abbreviate-file-name): Adapt tests.