PTRACE HARDENING: copy flags to prison in same flavor than pax.
Merge branch 'hardened/current/ptrace' of https://github.com/hardenedbsd/hardenedbsd into hardened/current/ptrace
Merge branch 'hardened/current/ptrace' of https://github.com/hardenedbsd/hardenedbsd into hardened/current/ptrace
PTRACE HARDENING: few other clean ups. plus copy sysctl settings to jail eventually same flavor than pax.