[[!comment format=mdwn
 username="http://joeyh.name/"
 subject="comment 2"
 date="2012-09-20T21:55:57Z"
 content="""
`addurl` only uses the URL- keys if you run it with --fast. Otherwise it downloads the content and hashes it the same as `add` does.

If you use `--fast`, you can go back and `git annex migrate` the file once it's been downloaded, to convert 
it to the SHA backend.
"""]]