Import rdfind-1.3.4 as wip/rdfind.

Rdfind is a program that finds duplicate files. It is useful for compressing
backup directories or just finding duplicate files. It compares files based on
their content, not on their file names.
Update to 1.4.4.
Some modification in order to ease the curl support (still NOT supported).
Ops, forgot to add and commit options.mk in the previous commit! :)