Update p5-Net-Libdnet to 0.96.

pkgsrc changes:
- Set LICENSE
- Add dependency to p5-Class-Gomor, as reported in PR pkg/45674.

Upstream changes:

0.96 Wed Nov 16 23:07:38 CET 2011
- bugfix: default to be compiled against libdnet (and not libdumbnet)
- update: added some die() in example programs

0.95 Sun Mar 13 23:47:10 CET 2011
- new: added ubuntu and standard patchs. See README.

0.94 Fri Jan 14 11:09:49 CET 2011
- bugfix: tohash method in pod
- applied http://rt.cpan.org/Public/Bug/Display.html?id=52359

0.93 Thu Jan 13 11:07:07 CET 2011
- update: makes components more inline with local install
of libdnet
- update: copyright notice

(gls)