Bug#632689: scalpel: upstream changed

[ydirson at free.fr]

Looking for 2.0 source, one rapidly notices that the upstream Homepage
is not valid any more.

Digging a bit:
* Fedora seems to have an upstream tarball at
  http://pkgs.fedoraproject.org/lookaside/pkgs/scalpel/scalpel-2.0.tar.gz/b0da813bf34941e79209d7fafe86a6e6/
* http://fossies.org/linux/misc/scalpel-2.0.tar.gz/ points to
  https://github.com/sleuthkit/scalpel, which appears to be 2.0 + some patches, but
  was last changed in 2014