FR: syntactic sugar for 'sudo' multi-hops with .ssh/config

[Tom Roche]

Allow me to make a feature request for the following, or tell me how to do 
correctly what fails below:

I have ~/.ssh/config with a stanza (for a cloud machine for which I can't 
easily set DNS) like

> Host 12.34.56.78 cloud c
>      HostName 12.34.56.78
>      Port 22
>      User me

With TRAMP, I can open normal files with syntax like

/c:my_dir/my_file

(which still amazes me sometimes :-) And thanks to ad-hoc multi-hop, I can also 
`sudo` files like

/ssh:c|sudo:12.34.56.78:/root/owned/path

... which is *almost* magic enough :-) What I'd prefer is, not to hafta 
remember the hostname (or IP#, in this case)--i.e., I'd prefer to be able to do

/ssh:c|sudo:c:/path/to/file  # fails in my emacs version='GNU Emacs 24.3.1' on 
debian

Hence my Feature Request: could TRAMP be made smart enough to know, if it saw 

/ssh:<.ssh/config token/>|sudo:<same .ssh/config token/>:/path/to/file

to use *both* the User and HostName (from ~/.ssh/config) in the first instance, 
but *only* the HostName in the second instance?

Apologies if

* this is a FAQ, but I didn't see a match when casually DuckDuckGo-ing
* this is already done upstream (I tend to stay on packaged builds)
* the maillist is not the best way to do FRs, but I didn't see anything about 
how to do FRs in the TRAMP User Manual (just bugs)

and thanks again for this brilliant package, Tom Roche <address@hidden>