New port: sysutils/jdupes

jdupes is a program for identifying and taking actions upon duplicate
files. It is a fork of fdupes, but not a drop-in replacement.

See http://www.virkki.com/jyri/articles/index.php/dupd-vs-jdupes-take-2/
for a comparision to dupd.

WWW: https://github.com/jbruchon/jdupes

PR: 218665
Submitted by: Thomas Hurst <tom@hur.st>