versioning of authirity section

[Peter C Davis <peter.davis@neustar.biz>]

(In case you haven't noticed, I am finally catching up on xri activities :-)

line 159:
[ISSUE: It would be nice if naming authority parts were NOT versioned to 
make resolution simpler. Then, only the  local part  segments have 
versioning info in them, and interpretation of this versioning 
information would be local to the client and ultimate  leaf  directory. ]

However, for URI-type XRI's, it MAY prove usefull to allow versioning of 
the authority part:

xri://some.domain.int[;2001-03-04T20:15:40Z]/foo/bar

esp. since URIs are re-assignable. This allows for "This was the 
authority at time T".

--- peterd