[ppml] Allocation and reallocation

[Michael.Dillon at radianz.com]

>That is, RIRs ALLOCATE to LIRs.  End users,
>on the other hand, receive ASSIGNMENTS from LIRs or RIRs.

An important point. There are two types of organizations, LIRs and
end users. RIRs assign to LIRs but end users can receive their
allocation from either LIRs (the normal case) or RIRs.

--Michael Dillon