BPF_MAP_TYPE_PERCPU_ARRAY was introduced in kernel version 4.6, so with
latest changes to intercept processes we lost support for older kernels
< 4.6.
Now we work again for example on kernels 4.4.
- Get cmdline arguments from kernel along with the absolute path to the
binary.
If the cmdline has more than 20 arguments, or one of the arguments is
longer than 256 bytes, get it from ProcFS.
- Improved stopping ebpf monitor method.