AbstractNetworkJob: Add a delete job.

It is needed to easily send delete requests which happen
through the notify API.

src/libsync/abstractnetworkjob.cpp

@@ -148,6 +148,11 @@ QNetworkReply *AbstractNetworkJob::headRequest(const QUrl &url)
     return addTimer(_account->headRequest(url));
 }
 
+QNetworkReply *AbstractNetworkJob::deleteRequest(const QUrl &url)
+{
+    return addTimer(_account->deleteRequest(url));
+}
+
 void AbstractNetworkJob::slotFinished()
 {
     _timer.stop();

src/libsync/abstractnetworkjob.h

@@ -77,6 +77,7 @@ protected:
     QNetworkReply* getRequest(const QUrl &url);
     QNetworkReply* headRequest(const QString &relPath);
     QNetworkReply* headRequest(const QUrl &url);
+    QNetworkReply* deleteRequest(const QUrl &url);
 
     int maxRedirects() const { return 10; }
     virtual bool finished() = 0;

src/libsync/account.cpp

@@ -239,6 +239,15 @@ QNetworkReply *Account::getRequest(const QUrl &url)
     return _am->get(request);
 }
 
+QNetworkReply *Account::deleteRequest( const QUrl &url)
+{
+    QNetworkRequest request(url);
+#if QT_VERSION > QT_VERSION_CHECK(4, 8, 4)
+    request.setSslConfiguration(this->getOrCreateSslConfig());
+#endif
+    return _am->deleteResource(request);
+}
+
 QNetworkReply *Account::davRequest(const QByteArray &verb, const QString &relPath, QNetworkRequest req, QIODevice *data)
 {
     return davRequest(verb, concatUrlPath(davUrl(), relPath), req, data);

src/libsync/account.h

@@ -111,6 +111,7 @@ public:
     QNetworkReply* headRequest(const QUrl &url);
     QNetworkReply* getRequest(const QString &relPath);
     QNetworkReply* getRequest(const QUrl &url);
+    QNetworkReply* deleteRequest( const QUrl &url);
     QNetworkReply* davRequest(const QByteArray &verb, const QString &relPath, QNetworkRequest req, QIODevice *data = 0);
     QNetworkReply* davRequest(const QByteArray &verb, const QUrl &url, QNetworkRequest req, QIODevice *data = 0);