This fixes https://code.google.com/p/singularity-viewer/issues/detail?id=705
Adds 'bool redirect_status_ok(void) const { return true; }' to LLIamHere,
because it's ok to receive a 302 status there. Likewise added to LLIamHereVoice,
because that has the same comment in its error() method.
Also fixes the problem that if two redirects occur on a row, then the
upload_finished detection asserted because it would detect the third
time that libcurl turned off writing to the socket as a failure (the
second time wasn't a problem because mUploadFinished was reset upon
receiving the first 302 header, but not upon receiving the second
header).
b20886a481