[tahoe-lafs-trac-stream] [Tahoe-LAFS] #2816: make sure tub.location and tub.port can be empty

[Tahoe-LAFS]

#2816: make sure tub.location and tub.port can be empty
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     Reporter:  warner          |      Owner:  warner
         Type:  task            |     Status:  new
     Priority:  normal          |  Milestone:  1.12.0
    Component:  code-nodeadmin  |    Version:  1.11.0
   Resolution:                  |   Keywords:
Launchpad Bug:                  |
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Comment (by warner):

 https://tahoe-lafs.org/trac/tahoe-lafs/ticket/517#comment:43 discusses the
 expected behavior of `tub.location`.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/2816#comment:1>
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