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Add a new method init_network to NS3E2ENet that does some initialization
before the experiment is run. It should be called after all components
were added to the network.

This introduces the E2ELinkAssigner that can automatically create links
of given types and create all the necessary NS3E2ENet instances.

Subclasses can override to set up more state before the rest of the
initialization for running occurs.

So far NIC sims would directly modify the NetSim's list, not giving the
opportunity for subclasses to override. This istead adds a method for this.

Useful for running ns-3 only simulations.

This adds a new component E2ESimbricksNetwork to the end-to-end
framework, which allows to connect to other simulated networks through
Simbricks.

This avoids issues for parameter strings containing characters that are
treated specially while parsing the arguments, e.g. whitespace.

Instead of passing all parameters using the command line, we write them
first into a file and then pass the filename to the end-to-end
framework.

Use the new basic building blocks SwitchNode and SimpleChannel in the
ns3 end-to-end framework to build topologies.

This adds support for configuring and running simulations using the ns3
end-to-end framework.

Add all TCP congestion control algorithms that are currently available
in the kernel source tree as loadable modules.

Update to newer ns-3 version and adapt code for changes (mostly
renamed files and command line parameters) in the ns-3 submodule.

This image contains chrony, ptp tools, and the modified cockroachdb

Also implements support for passing this through to qemu.

This change is mostly about the default semantics of asyncio.wait(). It
doesn't forward any exceptions that are raised by any of the coroutines
it waits for. This effectively causes exceptions to be swallowed. In
contrast, asyncio.gather() forwards exceptions to its calling coroutine.