[rsbac] RSBAC for kernel 6.6

Hi,

RSBAC has been ported successfully to LTS kernel 6.6. Internal kernel changes to the Linux caps structure required new on-disk versions of all RSBAC lists holding cap vectors.

I took the chance to default CONFIG_RSBAC_MOVETO to yes with 6.6 and auto-adjust RC and ACL FD lists with new versions, too. Existing WRITE right to FD targets gets amended with MOVETO during list upgrade to avoid unexpected behaviour.

The automatic list version upgrades mean that going back to previous kernels might show invalid lists, you need to boot with rsbac_list_recover kernel parameter and set cap related and RC and ACL FD values again.

In my tests, 6.6 seems to be running pretty well, please give it a try and report.

Amon.