Need to document how augmentation of requirements works as a special section under Requirement definition grammar.

An example in Section 17 shows this:
------

requirements:

• server: ServerNode
  relationship: ConnectsTo

1. MUSTFIX: Document that the following statements (as a general facilty) can augment a requirement
2. (relationship) that was identified/instantiated by the previous 2 lines.
3. Specifically, in this example, the following augment resulting Relationship’s "interfaces" keyword
   interfaces:
   Configure:
   inputs:
   targ_notify_port:
   Unknown macro: { get_attribute}
4. other operation definitions omitted here for sake of brevity