[rsbac] RSBAC for kernel 6.18

Hi there,

RSBAC has been ported successfully to the new LTS kernel 6.18.

In my tests, 6.18 works fine. Please give it a try and report. Patches are at https://download.rsbac.org/latestdiff/6.18/

In 6.18 I removed the RSBAC secure delete support. It has not been maintained or well tested for a while and can make trouble in various filesystems. With journaled file systems like ext4 it makes litte sense anyway. This removal is going to be backported into older kernels soon.

Amon.