Improve encryption support with simple PSK management

[kr4ut]

Is your feature request related to a problem? Please describe.
Problem is encryption support in Zabbix is tricky to setup and currently blocks also features like network discovery and auto registration. With the basic encryption bits in place already we can help out here with Ansible.

Describe the solution you'd like
An optional KISS solution for this problem can be provided via this role. While PKI support might be not generic enough with PSK a simple default management of putting credentials on client and server can be achived.

Additional context
We already have some internally in place i like to put push for a PR ...

[dj-wasabi]

Hi @kr4ut

I'm all for it if you think it improves the current role and could help others as well. 👍

[kr4ut]

@dj-wasabi There you go 👍 BTW hope we meet at CfgMgmtCamp in Gent next year. Would be happy to invite you for dinner there with the usual suspects like @dagwieers 🍻

[dj-wasabi]

@kr4ut

I'll try to be there, haven't had a chance to go there. 👍