Improve requirements where the CA is the Applicant/Subscriber

[CBonnell]

Potential broader considerations: relationship between Applicant, Subscriber, and Subject, especially in complex situations involving hosting.

3.2 and 4.9 were referenced as potentially having problems.

Additionally, there are language problems when the Applicant/Subscriber/Subject is the CA.

[CBonnell]

This was discussed at the 2022-07-28 meeting.

There was agreement that the clarification of terms could be tackled as part of the "shared definitions" document effort.

There was further agreement that the problems/contradictions/ambiguities in the requirements that are introduced when the CA is the Applicant/Subscriber should be tackled with this item.