Tramp proxies

[Michael Albinus]

Hello,

I've committed a bigger patch to Tramp CVS. In fact, multi-hop
methods are completely removed. Instead of, proxies are
introduced. See docstring of `tramp-default-proxies-alist'.

Documentation is not updated yet, this will be the next task.
Shortly said, you can declare something like this:

;; Emacs
(add-to-list 'tramp-default-proxies-alist
             (list "\\`real\\.host\\'" "kai" "/rsh:address@hidden:"))
;; XEmacs
(add-to-list 'tramp-default-proxies-alist
             (list "\\`real\\.host\\'" "kai" "[rsh/address@hidden"))

Then "/telnet:address@hidden:/path/to.file" (resp. the XEmacs
equivalent) would always go via "/rsh:address@hidden:".

I've tested it mostly straight forward; for sure there are several
checks missing for robustness. I'ld be glad to get some feedback,
before releasing Tramp 2.1.1 within some few weeks.

People you don't want to apply it now could still keep Tramp 2.0.x,
which is kept maintained. And this is the release which will come with
Emacs 21.4.

Best regards, Michael.