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this should solve test failure on MacOS.  committing at my discretion.

Conflicts:
	src/lib/dns/name.cc

as suggested in #2084.  not sure why 'using namespace bind' didn't work
(and the signature is so special that there wouldn't be ambiguity)
but in any case this namespace is too large so it's better to not try to
specify the entire space.
with this change we don't need to declare using the entire space, so I
removed it, too.
okayed on jabber, directly committing.

okayed via jabber

These details capture the output of tools without any post-parsing, as
the support team will likely want to see all the raw data instead of a
subset of it.