fix: ignore IPv6 setup error for Linux

This error can be cased by system disabled IPv6

client/platforms/linux/daemon/iputilslinux.cpp

@@ -31,7 +31,9 @@ IPUtilsLinux::~IPUtilsLinux() {
 }
 
 bool IPUtilsLinux::addInterfaceIPs(const InterfaceConfig& config) {
-  return addIP4AddressToDevice(config) && addIP6AddressToDevice(config);
+  bool ret = addIP4AddressToDevice(config);
+  addIP6AddressToDevice(config);
+  return ret;
 }
 
 bool IPUtilsLinux::setMTUAndUp(const InterfaceConfig& config) {

client/platforms/windows/daemon/wireguardutilswindows.cpp

@@ -14,8 +14,6 @@
 
 #include "leakdetector.h"
 #include "logger.h"
-#include "platforms/windows/windowscommons.h"
-#include "windowsdaemon.h"
 #include "windowsfirewall.h"
 
 #pragma comment(lib, "iphlpapi.lib")
@@ -269,6 +267,13 @@ bool WireguardUtilsWindows::updateRoutePrefix(const IPAddress& prefix) {
   if (result == ERROR_OBJECT_ALREADY_EXISTS) {
     return true;
   }
+
+  // Case for ipv6 route with disabled ipv6
+  if (prefix.address().protocol() == QAbstractSocket::IPv6Protocol
+      && result == ERROR_NOT_FOUND) {
+    return true;
+  }
+
   if (result != NO_ERROR) {
     logger.error() << "Failed to create route to"
                    << prefix.toString()