Add pflua benchmarking tool, from pflua repo.
Update pflua tag.
Update username for pflua submodule.
Ignore dirty state of pflua submodule.
Move deps up a level

* .gitmodules: Move deps from src/deps to deps.
Remove old pflua submodule checkout (?)
Re-add pflua submodule
Make builds luajit

* Makefile: Update so that make builds luajit.
Https for submodule
Add ping flood trace

* src/ts/pcaps/igalia/ping-flood.pcap
Update tests

* src/Makefile:
* src/bpf_libpcap_ts.lua:
* src/bpf_pflua_ts.lua: Update test files for pflua move and interface
  change.