netatop module needs updating for kernel >= 4.13.0

[ReubenM]

module build fails:

netatop-1.0/module/netatop.c: In function ‘init_module’:
netatop-1.0/module/netatop.c:1753:2: error: implicit declaration of function ‘nf_register_hook’ [-Werror=implicit-function-declaration]
  nf_register_hook(&hookin_ipv4);   // register hook
  ^~~~~~~~~~~~~~~~
netatop-1.0/module/netatop.c: In function ‘cleanup_module’:
netatop-1.0/module/netatop.c:1783:2: error: implicit declaration of function ‘nf_unregister_hook’ [-Werror=implicit-function-declaration]
  nf_unregister_hook(&hookin_ipv4);
  ^~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors

[ReubenM]

The issue is that the two functions were dropped in 4.13.0-rc2 because they are not namespace aware. There are equivalent namespace aware functions, but just swapping them out is not enough. (Compiles and runs, but all network metrics are 0's). So there is some more changes needed to make it work that I don't have the expertise to go digging into.

[Atoptool]

Since netatop is not part of the atop repository, find the modified version 2.0 of netatop here:
https://www.atoptool.nl/downloadnetatop.php

Netatop will soon be a separate repository on GitHub.