Cleanup

[OR13]

Cleaning up terminology, attempting to resolve issues from previous PR reviews.

Closes:

• https://github.com/mesur-io/ietf-misc/issues/5
• https://github.com/mesur-io/ietf-misc/issues/4
• https://github.com/mesur-io/ietf-misc/issues/2
• https://github.com/mesur-io/ietf-misc/issues/1