sysdig: update to 0.1.82
luajit: support Darwin builds
sysdig: support builds without the kernel module, add pkgs.sysdig attr
Set console=ttyS0 for Amazon EC2 instances, as suggested by Amazon.
dhcpcd: Allow adding hook code
Merge pull request #2625 from wmertens/dhcpcd-hooks

dhcpcd: Allow adding hook code
Merge branch 'sysdig-0.1.82-now-with-osx' of git://github.com/proger/nixpkgs

sysdig: updated to 0.1.82, starting to support Darwin builds (includes
luajit Darwin support)