Add to TF Manual: information about Webmin, needs to be explained how to use it, what's possible, can point towards other existing resources about Webmin

[samtaggart]

@sasha-astiadi Are you able to add this to the manual?

[sasha-astiadi]

i was off last week, ill see what i can do now @samtaggart

[samtaggart]

Hi hi, The issue is from December but ... thank you! 😄