Docs: Extending terminology & improving  hyper-link

This PR is based on commit e12e2b89. It extends the changes across
all available Docker docs sources to date.

It also corrects hyper-links and their labels where necessary.

It strictly follows the conventions set forth by e12e2b89. 

Docker-DCO-1.1-Signed-off-by: O.S. Tezer <ostezer@gmail.com> (github: ostezer)