bugfix: determine ipv4 forwarding from user forwarding configuration

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
bugfix: determine ipv6 forwarding from user forwarding + ipv6 configuration

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
bugfix: correctly enable sysrqs if desired

sysrqs are either set from secure_sysrq or disabled. the user controls it via enable_sysrq setting in security/kernel

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
Merge pull request #11 from TelekomLabs/sysctl-fixes

sysctl fixes