rpm2cpio: move from cvsweb to svnweb for FreeBSD

The old location just gives an error now: "No valid CVS roots found!"

It would probably be a good idea to change the installed binary name to "rpm2cpio.pl" as well,
to make it not conflict with the binary version of the program installed with the rpm installation...

The version is wrong too, btw. Even if the CVS number was 1.4, the upstream calls it "1.3_1"