Patch to add resume feature to scp

[Chris Rapier]

Corinna Vinschen wrote:

> I'm almost 100% sure that users could be trained using sftp if two
> scp command line options are added to sftp, -r and -p.


Really depends on the users doesn't it? At our facility we supply grants 
of computing time and other resources on 3000+ node supercomputers to at 
least 12,000 local users, researchers, scientists, and organizations 
scattered throughout the US and the world. We could probably force our 
local staff to make any changes but the researchers and scientists? It 
would be about as easy as shaving a cat hopped up on coke - especially 
if they didn't perceive any compelling reason to do it (like a 
performance boost). As such, anything that breaks a script or changes 
how they do something is a disaster for us.

There are at least 4 other centers that do similar things and would have 
similar problems.