d/control: bump standars to 3.9.6
d/control: bump standars to 3.9.6

No special changes required.

Signed-off-by: Arturo Borrero Gonzalez <08787c72be15fc0aaf7bfde37e2aab5e1957f12a@cica.es>

mmoya/pkg-thc-ipv6,mmoya/pkg-thc-ipv6,mmoya/pkg-thc-ipv6