doc: Add some troubleshooting Pro-Tips(tm)
doc: Add some troubleshooting Pro-Tips(tm)

Useful to have these laying around somewhere. This is the kind of thing
I was doing just now while testing things after the Ansible 2.7.0
update.

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent