MSVC compilation has been broken since at least 1e417b72 ("All remaining
files in src/common belong to the event loop.") deleted
src/common/Makefile.nmake in 2018.

Signed-off-by: David Goulet <dgoulet@torproject.org>

Signed-off-by: David Goulet <dgoulet@torproject.org>

Signed-off-by: David Goulet <dgoulet@torproject.org>

Signed-off-by: David Goulet <dgoulet@torproject.org>

Signed-off-by: David Goulet <dgoulet@torproject.org>

It came as a surprise that Serge, the bridge authority, omits the Running
flag for all bridges in its first 30 minutes after a restart:
https://bugs.torproject.org/tpo/anti-censorship/rdsys/102

The fix we're doing for now is to accept it as correct behavior in
Tor, and change all the supporting tools to be able to handle bridge
networkstatus docs that have no Running bridges.

I'm documenting it here inside Tor too so the next person might not
be so surprised.

Part of #40560

Signed-off-by: David Goulet <dgoulet@torproject.org>

This code was heavily reused from the previous DNS timeout work done in
ticket #40491 that was removed afterall from our code.

Closes #40560

Signed-off-by: David Goulet <dgoulet@torproject.org>

cat will always print "cat: test_network_log: Is a directory". change it to
head -n -0, which is arguably not the perfect format but is at least somewhat
useful.

Apparently glibc-2.34 uses clone3, when previously it just used
clone.

Closes ticket #40590.