Change some URLs from author dirs to dist dirs.
The example in the porter's handbook didn't have the trailing slash;
mea culpa for not having caught that when it went in.
Yuliang Zheng, Josef Pieprzyk, and Jennifer Seberry. The number of rounds can
be 3, 4, or 5, while the hash length can be 128, 160, 192, 224, or 256 bits.
Thus, there are a total of 15 different outputs. For better security, however,
this module implements the 5-round, 256-bit output.
WWW: http://search.cpan.org/dist/Digest-Haval256
PR: ports/90534
Submitted by: Gabor Kovesdan
