Update configuration.md for role name check

[AlexanderStohr]

• fixed links to other docs on the web (name standard for namespace and role)
• added hint for extra freedom with a computed fully qualified role name

[AlexanderStohr]

if that were code i would add the label 'bug'.
but as its only documentation, i would rather add the label 'minor'.
as of now i cant see any "gear" symbol or edit button that would allow me to add any label at all.

[AlexanderStohr]

@ssbarnea @audgirka @ziegenberg - are you interested in participating with this little change?

[AlexanderStohr]

if that were code i would add the label 'bug'. but as its only documentation, i would rather add the label 'minor'. as of now i cant see any "gear" symbol or edit button that would allow me to add any label at all.

only the label is still /open/.
please assist, so this fix can continue. thank you.