Consider rewriting the bpf probes

[haesbaert]

While the current bpf probes work, there's a series of issues that make me wanna rewrite them:

• All structures are unaligned.
• The TCP probe has issues, we don't have a flag for attempted connection, a better implementation would be to not use the tracing probes, and use the actual tcp probes.
• The style looks like Go.
• There are too many files and subdirectories, and they have the same name Probe.bpf.c, it's a pain to navigate.
• There are missing spots for accounting for dropped events.
• Some probes rely on user data which might not be faulted in.

There's a lot of knowledge there that should be kept, especially regarding old kernels, but for a better and brighter future we should consider rewriting them.