httrack 4.47.6 is obsolete, sha1 is wrong - updating to 3.47.7

httrack 4.47.6 is obsolete, sha1 is wrong - updating to 3.47.7 - tested and pass osx 10.7.5

http://download.httrack.com/httrack-3.47.6.tar.gz redirects to http://www.httrack.com/page/2/ and that might be the reason why the sha1 is wrong. I've updated the url and sha1 and successfully downloaded and install the formula on OS X 10.7.5