Merge bitcoin/bitcoin#22390: system: skip trying to set the locale on NetBSD

fdd7144 system: skip trying to set the locale on NetBSD (fanquake)

Pull request description:

  Just treat it the same as the other BSDs.

  Fixes #17379.

ACKs for top commit:
  laanwj:
    Code review ACK fdd7144
  practicalswift:
    cr ACK fdd7144

Tree-SHA512: 5fe0a66f014279ad2683b548692a36af493377fb92d1f28b15dc4feef871190fe08ef40dcc4f5ba21a525fe365c42fb429fe4be0673a1e96db163af587c23204

Author: fanquake

src/util/system.cpp

@@ -1306,7 +1306,7 @@ void SetupEnvironment()
 #endif
     // On most POSIX systems (e.g. Linux, but not BSD) the environment's locale
     // may be invalid, in which case the "C.UTF-8" locale is used as fallback.
-#if !defined(WIN32) && !defined(MAC_OSX) && !defined(__FreeBSD__) && !defined(__OpenBSD__)
+#if !defined(WIN32) && !defined(MAC_OSX) && !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__)
     try {
         std::locale(""); // Raises a runtime error if current locale is invalid
     } catch (const std::runtime_error&) {