naett: Let naettInit be called more than once

It asserted that it was the first call, so net::Init - which is documented as
safe to call repeatedly, and is - needed a bool of its own purely to guard this
one line. That's bookkeeping the library may as well do itself, and the WSA half
of the same function already says as much: it doesn't track anything because
WSAStartup counts its own references.

So a repeat call does nothing, and net::Init loses g_naettInitialized. Asking
HTTPSAvailable() twice costs nothing - on Linux it's a cached dlopen result and
everywhere else it's a constant.

Common/Net/Resolve.cpp

@@ -31,7 +31,6 @@ extern JavaVM *gJvm;
 
 namespace net {
 
-static bool g_naettInitialized;
 static bool g_wsaInitialized;
 
 void Init() {
@@ -44,19 +43,18 @@ void Init() {
 		g_wsaInitialized = true;
 	}
 #endif
-	if (!g_naettInitialized) {
+	// naett ignores repeat calls the same way WSAStartup does, so there's nothing to track here
+	// either. HTTPSAvailable is cheap to ask twice - on Linux it's a cached dlopen result.
 #ifndef HTTPS_NOT_AVAILABLE
 #if PPSSPP_PLATFORM(ANDROID)
-		_assert_(gJvm != nullptr);
-		naettInit(gJvm);
+	_assert_(gJvm != nullptr);
+	naettInit(gJvm);
 #else
-		if (HTTPSAvailable()) {
-			naettInit(NULL);
-		}
-#endif
-#endif
-		g_naettInitialized = true;
+	if (HTTPSAvailable()) {
+		naettInit(NULL);
 	}
+#endif
+#endif
 }
 
 bool HTTPSAvailable() {