Some broken GitHub links

[DavidAntliff]

E.g. on page https://andreaskaris.github.io/blog/networking/netlink/, the link to https://github.com/andreaskaris/blog/blob/master/messenger.py is broken.

It should probably be https://github.com/andreaskaris/blog/blob/master/src/messenger.py instead. There may be others with a similar problem.

Also, can I suggest adding the link to your blog - https://andreaskaris.github.io/blog - to this repo's README? I actually found your repo first, and had to search around for the blog itself as there was no link I could find here.