Bug#356810: libcrypt-cbc-perl: behaviour-change; header_iv bugs (both sending as receiving)

[Gustavo Franco]

Hi Bas,

There's a new package that was being tested until today, that i'll upload
soon. The problem with the first fix is that we imported too much code
from the upstream fix (2.17), that is broken in a way too.

I wrote the fix from scratch again, ignoring upstream changes. Allard
Hoeve and Robert Lemmen helped with additional tests.

Thanks,
Gustavo Franco - <stratus at debian.org>