Closes #40314

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

When reloading a service, we can re-register a service and thus end up again
in the metrics store initialization code path which is fine. No need to BUG()
anymore.

Fixes #40334

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

Fixes bug #40256; bugfix on 0.2.9.4-alpha.

Use find_str_at_start_of_line(), not strstr() here: we don't want
to match "MemTotal: " if it appears in the middle of a line.

Fixes #40315; bugfix on 0.2.5.4-alpha.

This patch unbreaks the Windows build on master that was introduced in
99703eac.

Now deprecated in libc >= 2.33

Closes #40309

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