refactor argument parsing into parseArgs
check none exist network file
Fix typos in TorNet.py
Ensure chutney relays can exit to localhost IPv4 and IPv6

Keep up to date with changes in the latest tor versions, where localhost
exits are blocked by default, even in TestingTorNetworks.

relay.tmpl: permit exits to IPv4 and IPv6 (tor versions without the
torrc IPv6 options will benefit from the changes in
issue-13161-check-torrc-options).

relay-exit-v4-only.tmpl, relay-exit-v6-only.tmpl, relay-non-exit.tmpl:
self-explanatory variants.

exit-v4.i, exit-v6.i: include files containing the exit lines for IPv4
and IPv6.
Enable Debugging of chutney-launched tor nodes

Set DisableDebuggerAttachment to 0, because if you're running a
test network, you might actually want to use a debugger on tor.
Increase relays to compensate for smaller guard fraction

Since the guard percentage has been reduced from 50% to 25% of relays,
we need more relays to compensate. This patch uses 8 relays, ensuring
at least 2 guards on all known tor versions.
Force authorities to vote Exit & Guard for all nodes

Use the new tor TestingDirAuthVoteExit option, and the
TestingDirAuthVoteGuard option, to make all authorities vote all relays
(and authorities) as exits and guards. This ensures that tor's
make test-network will work. But it's a sledgehammer approach.

Requires either the new tor TestingDirAuthVoteExit option, or the
issue-13161-check-torrc-options patch for chutney.
Merge branch 'issue-13161-typos' into issue-13161-check-torrc-options

Fix a single typo in lib/chutney/TorNet.py
Create a middle flavour, and size variants for basic and middle

Create a middle flavour, which includes non-exit routers.

Create size variants for basic and middle, with 25 and 100 tor nodes.
As these variants get larger, approximate the proportions of the global
tor network.
Merge remote-tracking branches 'teor/issue-13161-template-tweaks' and 'teor/issue-13161-check-torrc-options'
Merge branch 'master' of https://git.torproject.org/chutney
Merge remote-tracking branch 'houqp/miss_network_error'
Increase relays to compensate for smaller guard fraction #2

Increase relays to compensate for smaller guard fraction in mixed,
bridges, and bridges+ipv6 flavours.
Merge remote-tracking branch 'teor/issue-13161-template-tweaks'
Merge branch 'master' of https://git.torproject.org/chutney
Minimum network with 3 authorities, 1 exit, and 1 client

Useful for reducing test cases to the simplest possible config.
Avoids race conditions and dependencies among multiple instances.
Merge branch 'basic-min'