Brackup::Target::Sftp

[Martin Atkins]

Gavin Carr wrote:
> 
> And out of interest, why do we use colons in chunk names at all, given 
> they're problematic with some filesystems? Maybe it would be better just to 
> use type.checksum.brackup everywhere?
> 

That's a historical annoyance. Initially Brackup used colons, but then I 
tried to make it work on Windows and hit this issue. By that time there 
were already users with backup targets using colons on UNIX systems, so 
if I changed the default I'd break them. Hence this ridiculous flag. 
(which, in retrospect, should have been called use_filename_colons and 
defaulted to true, I agree. Oh well.)

However, new targets aren't stuck with this legacy, so they can use some 
other symbol as the default.