Test on macOS 12.2.1 against the master branch. #24397 doesn't fix it.

```
brew info boost
boost: stable 1.78.0 (bottled), HEAD
...
./configure --enable-external-signer
...
checking for boostlib >= 1.64.0 (106400)... yes
checking whether Boost.Process can be used... no
configure: error: External signing is not supported for this Boost version
```

It does work with boost 1.76 (there was no 1.77 release in home-brew):

```
brew install boost@1.76
...
LDFLAGS="-L/usr/local/opt/boost@1.76/lib" CPPFLAGS="-I/usr/local/opt/boost@1.76/include" ./configure --enable-external-signer
...
checking for boostlib >= 1.64.0 (106400)... yes
checking whether Boost.Process can be used... yes
...
Options used to compile and link:
  external signer = yes
```

There's nothing in the release notes about Boost.Process for either [1.77](https://www.boost.org/users/history/version_1_77_0.html) or [1.78](https://www.boost.org/users/history/version_1_78_0.html).

The Homebrew [formula changes](https://github.com/Homebrew/homebrew-core/commits/master/Formula/boost.rb) are nothing but a trivial version and hash bump.
const std::string& prefix,
    const std::string& section,
    const std::map<std::string, std::vector<util::SettingsValue>>& args) const
{
    std::string section_str = section.empty() ? "" : "[" + section + "] ";
    for (const auto& arg : args) {
        for (const auto& value : arg.second) {
            std::optional<unsigned int> flags = GetArgFlags('-' + arg.first);
            if (flags) {
                std::string value_str = (*flags & SENSITIVE) ? "****" : value.write();
                LogPrintf("%s %s%s=%s\n", prefix, section_str, arg.first, value_str);
            }
        }
    }
}
void ArgsManager::LogArgs() const
{
    LOCK(cs_args);
    for (const auto& section : m_settings.ro_config) {
        logArgsPrefix("Config file arg:", section.first, section.second);
    }
    for (const auto& setting : m_settings.rw_settings) {
        LogPrintf("Setting file arg: %s = %s\n", setting.first, setting.second.write());
    }
    logArgsPrefix("Command-line arg:", "", m_settings.command_line_options);
}
bool RenameOver(fs::path src, fs::path dest)