Added comments, fixed typos
Added comments, fixed typos

When dealing with real ip addresses and domains in tutorials or
examples, it is better to use private ip addresses. The same for the
domainnames. You could use example.org, or example.com for this
purpose. When people copy those, no real harm should come to them.

EUDAT-Training/B2SAFE-B2STAGE-Training,EUDAT-Training/B2SAFE-B2STAGE-Training,EUDAT-Training/B2SAFE-B2STAGE-Training