Cookbook link broken / trap example

[aschamberger]

Issue Description

The link to the cookbook from the README leads to a "page not found".

I read the files in the "docs" folder and could not find an example for a trap listener. It would be great if you could add an example there.

HexDump

[ziesemer]

(For my future self and whoever else that runs across this issue and is looking for the same:)

For the missing "cookbook", the best that I can find of this from history is at https://github.com/exhuma/puresnmp/tree/v1.11.0.post1/docs/cookbook - which is the the latest (or close to latest) that I can find prior to its removal with the 2.0 release of the project. So this is at least "what it was" - though most if not all of it is now no longer valid with the conversion to asyncio for everything, which is most likely why it was removed. I do agree, though - the cookbook is referenced prominently in the main README.rst, and would be nice to have brought back around.

See also #96 and #107 regarding current support for traps. #107 may actually serve as one of the best currently available examples. (Yes, it is currently broken - but I have some other efforts around this that I hope to circle back around to as well, which I'll probably start with on those tickets.)