`p2p_seednode.py` would try to connect to `0.0.0.1` and `0.0.0.2` as
seed nodes. This sends outbound TCP packets on a non-loopback interface
to the default router.
Configure an unavailable proxy for all executions of `bitcoind` during
this test. Also change `0.0.0.1` and `0.0.0.2` because connecting to
them would skip the `-proxy=` setting because for such an address:
* `CNetAddr::IsLocal()` is true, thus
* `CNetAddr::IsRoutable()` is false, thus
* `CNetAddr::GetNetwork()` is `NET_UNROUTABLE`, even though
`CNetAddr::m_net` is `NET_IPV4`.
This speeds up the execution time of `p2p_seednode.py`
from 12.5s to 2.5s.
These addrs aren't unreachable as the test claims.
Specify a (non-working) proxy to make sure the connections fails
even if the addr was reachable.
Co-authored-by: Vasil Dimov <vd@FreeBSD.org>
On some CI runs, the timer in ThreadOpenConnection was only started *after*
the mocktime was set. Fix this by waiting for the first connection attempt,
which happens after the timer was started.
Also convert some comments into log messages/add a log, so that the test
isn't completely silent.
