We want to monitor traffic and tools that are used
to interact with our network so we need to append
its user agent.
The same user agent is appended for current uplink
and uplinkng as eventually we will remove first.
Change-Id: I116080d6c2c6c85d591771facf01356de02a9392
this changes globalFlags to be a ulext.External
interface value that is passed to each command.
rather than have the ulext.External have a Setup
call in the way that the projectProvider used to
we make all of the state arguments to the functions
and have the commands call setup themselves.
the reason it is in its own package is so that
cmd/uplinkng can import cmd/uplinkng/ultest
but cmd/uplinkng/ultest needs to refer to whatever
the interface type is to call the function that
creates the commands.
there's also quite a bit of shuffling around of
code and names. sorry if that makes it tricky
to review. there should be no logic changes, though.
a side benefit is there's no longer a need to do
a type assertion in ultest to make it set the
fake filesystem to use. that can be passed in
directly now. additionally, this makes the
access commands much easier to test.
Change-Id: I29cf6a2144248a58b7a605a7ae0a5ada5cfd57b6