Fix OS X keychain bug in Qt 5

* Performing basic auth would pop up a keychain dialog
* Pressing "Accept" resulted in an infinite loop

src/NetworkAccessManager.cpp

@@ -8,6 +8,7 @@
 NetworkAccessManager::NetworkAccessManager(QObject *parent):QNetworkAccessManager(parent) {
   connect(this, SIGNAL(authenticationRequired(QNetworkReply*,QAuthenticator*)), SLOT(provideAuthentication(QNetworkReply*,QAuthenticator*)));
   connect(this, SIGNAL(finished(QNetworkReply *)), this, SLOT(finished(QNetworkReply *)));
+  disableKeyChainLookup();
 }
 
 QNetworkReply* NetworkAccessManager::createRequest(QNetworkAccessManager::Operation operation, const QNetworkRequest &request, QIODevice * outgoingData = 0) {
@@ -93,3 +94,12 @@ bool NetworkAccessManager::isBlacklisted(QUrl url) {
   return false;
 };
 
+/*
+ * This is a workaround for a Qt 5/OS X bug:
+ * https://bugreports.qt-project.org/browse/QTBUG-30434
+ */
+void NetworkAccessManager::disableKeyChainLookup() {
+  QNetworkProxy fixedProxy = proxy();
+  fixedProxy.setHostName(" ");
+  setProxy(fixedProxy);
+}

src/NetworkAccessManager.h

@@ -24,6 +24,8 @@ class NetworkAccessManager : public QNetworkAccessManager {
     QList<QUrl> m_urlBlacklist;
 
   private:
+    void disableKeyChainLookup();
+
     QHash<QString, QString> m_headers;
     bool isBlacklisted(QUrl url);
     QHash<QUrl, QUrl> m_redirectMappings;