fetch2: unpack revision
Revise the unpack function to have a way to disable the unpack. This is
based on the work from "Andreas Oberritter <obi@opendreambox.org>", see
http://cgit.openembedded.net/cgit.cgi/openembedded/commit/?id=
2bdfe8519eda8067845019a699acdf19a21ba380
In addition, the to_boolean function comes from the work of
"Chris Larson <chris_larson@mentor.com>", see
http://cgit.openembedded.net/cgit.cgi/openembedded/commit/?id=
900cc29b603691eb3a077cb660545ead3715ed54
Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
