NetworkManager: Use certificates from bundle only on Windows.

On other platforms, let's just use system certificates.

CHANGELOG

@@ -22,6 +22,7 @@ Version 1.4.0
     * disabled by default opacity effect on tab previews - see BUILDING
     * improved showing navigation toolbar in fullscreen
     * moved config directory into ~/.config/qupzilla
+    * certificates bundle is now only used on windows
     * fixed opening browser with url with ampersand (%26) as command line argument
     * fixed scrolling to anchor in background tabs
     * fixed parsing UTF-8 filenames in Content-Disposition header

src/lib/network/networkmanager.cpp

@@ -109,7 +109,6 @@ void NetworkManager::loadSettings()
     QSslConfiguration config = QSslConfiguration::defaultConfiguration();
     config.setPeerVerifyMode(QSslSocket::VerifyNone);
     QSslConfiguration::setDefaultConfiguration(config);
-#endif
 
     QString certDir = mApp->PROFILEDIR + "certificates";
     QString bundlePath = certDir + "/ca-bundle.crt";
@@ -129,6 +128,9 @@ void NetworkManager::loadSettings()
     }
 
     QSslSocket::setDefaultCaCertificates(QSslCertificate::fromPath(bundlePath));
+#else
+    QSslSocket::setDefaultCaCertificates(QSslSocket::systemCaCertificates());
+#endif
 
     m_proxyFactory->loadSettings();
 }
@@ -664,7 +666,9 @@ void NetworkManager::loadCertificates()
 
     QSslSocket::setDefaultCaCertificates(m_caCerts + m_localCerts);
 
+#ifdef Q_OS_WIN
     new CaBundleUpdater(this, this);
+#endif
 }
 
 void NetworkManager::disconnectObjects()