goagent/goagent — pull request #87 by soimort (2013-04-17 23:25:47+00:00)
Title: Fix Content-Length for Range

#73 fixed an important range fetch issue, however, the `Content-Length` field it sent back was problematic.
This may cause some script relies on that field determining the range length to fail (soimort/you-get#160).

I changed this so that correct `Content-Length` can be sent back properly.