When compiling without external signer support, the resulted `bench_bitcoin.exe` fails on Windows:
```
>.\bench_bitcoin.exe -filter=AddrManSelectByNetwork
Error: bad optional access
```

Steps to reproduce the failure:
- cross compiling on Ubuntu 22.04:
```
$ make -j $(nproc) -C depends HOST=x86_64-w64-mingw32 NO_QT=1
$ ./autogen.sh
$ ./configure CONFIG_SITE=$PWD/depends/x86_64-w64-mingw32/share/config.site --disable-external-signer
$ make -j $(nproc)
```
- compiling natively on Windows:

Apply the diff as follows:
```diff
--- a/build_msvc/bitcoin_config.h.in
+++ b/build_msvc/bitcoin_config.h.in
@@ -41,9 +41,6 @@
 /* Define this symbol to enable ZMQ functions */
 #define ENABLE_ZMQ 1
 
-/* define if external signer support is enabled (requires Boost::Process) */
-#define ENABLE_EXTERNAL_SIGNER /**/
-
 /* Define to 1 if you have the declaration of `be16toh', and to 0 if you
    don't. */
 #define HAVE_DECL_BE16TOH 0
```
Then
```
>py -3 build_msvc\msvc-autogen.py
>msbuild build_msvc\bitcoin.sln -property:Configuration=Release -verbosity:minimal
>src\bench_bitcoin.exe -filter=AddrManSelectByNetwork
Error: bad optional access
```

---

The failure does not manifest itself when running `bench_bitcoin.exe` using Wine on Linux.
{
    
    BOOST_CHECK_EQUAL(Join(std::vector<std::string>{}, ", "), "");
    BOOST_CHECK_EQUAL(Join(std::vector<std::string>{"foo"}, ", "), "foo");
    BOOST_CHECK_EQUAL(Join(std::vector<std::string>{"foo", "bar"}, ", "), "foo, bar");
    
    const auto op_upper = [](const std::string& s) { return ToUpper(s); };
    BOOST_CHECK_EQUAL(Join(std::list<std::string>{}, ", ", op_upper), "");
    BOOST_CHECK_EQUAL(Join(std::list<std::string>{"foo"}, ", ", op_upper), "FOO");
    BOOST_CHECK_EQUAL(Join(std::list<std::string>{"foo", "bar"}, ", ", op_upper), "FOO, BAR");
}
BOOST_AUTO_TEST_CASE(util_ReplaceAll)
{
    const std::string original("A test \"%s\" string '%s'.");
    auto test_replaceall = [&original](const std::string& search, const std::string& substitute, const std::string& expected) {
        auto test = original;
        ReplaceAll(test, search, substitute);
        BOOST_CHECK_EQUAL(test, expected);
    };
    test_replaceall("", "foo", original);
    test_replaceall(original, "foo", "foo");
    test_replaceall("%s", "foo", "A test \"foo\" string 'foo'.");
    test_replaceall("\"", "foo", "A test foo%sfoo string '%s'.");
    test_replaceall("'", "foo", "A test \"%s\" string foo%sfoo.");
}
BOOST_AUTO_TEST_CASE(util_TrimString)