siac downloads relative to siad
If siad is running in a different directory and you run siac download foo bar
, bar
will be placed in siad's curdir instead of the directory you ran siac from. Should be relatively simple to get siac's curdir and prepend that to relative download paths (absolute paths should remain unmodified).
This may be a problem for Sia-UI as well, though I think it just always uses absolute paths.