add http2 support

src/libsync/account.cpp

@@ -204,6 +204,7 @@ QNetworkReply *Account::headRequest(const QUrl &url)
     QNetworkRequest request(url);
 #if QT_VERSION > QT_VERSION_CHECK(4, 8, 4)
     request.setSslConfiguration(this->getOrCreateSslConfig());
+    request.setAttribute(QNetworkRequest::HTTP2AllowedAttribute, true);
 #endif
     return _am->head(request);
 }
@@ -218,6 +219,7 @@ QNetworkReply *Account::getRequest(const QUrl &url)
     QNetworkRequest request(url);
 #if QT_VERSION > QT_VERSION_CHECK(4, 8, 4)
     request.setSslConfiguration(this->getOrCreateSslConfig());
+    request.setAttribute(QNetworkRequest::HTTP2AllowedAttribute, true);
 #endif
     return _am->get(request);
 }
@@ -227,6 +229,7 @@ QNetworkReply *Account::deleteRequest( const QUrl &url)
     QNetworkRequest request(url);
 #if QT_VERSION > QT_VERSION_CHECK(4, 8, 4)
     request.setSslConfiguration(this->getOrCreateSslConfig());
+    request.setAttribute(QNetworkRequest::HTTP2AllowedAttribute, true);
 #endif
     return _am->deleteResource(request);
 }
@@ -241,6 +244,7 @@ QNetworkReply *Account::davRequest(const QByteArray &verb, const QUrl &url, QNet
     req.setUrl(url);
 #if QT_VERSION > QT_VERSION_CHECK(4, 8, 4)
     req.setSslConfiguration(this->getOrCreateSslConfig());
+    req.setAttribute(QNetworkRequest::HTTP2AllowedAttribute, true);
 #endif
     return _am->sendCustomRequest(req, verb, data);
 }

src/libsync/owncloudpropagator.cpp

@@ -74,17 +74,8 @@ OwncloudPropagator::~OwncloudPropagator()
 /* The maximum number of active jobs in parallel  */
 int OwncloudPropagator::maximumActiveJob()
 {
-    static int max = qgetenv("OWNCLOUD_MAX_PARALLEL").toUInt();
-    if (!max) {
-        max = 3; //default
-    }
-
-    if (_downloadLimit.fetchAndAddAcquire(0) != 0 || _uploadLimit.fetchAndAddAcquire(0) != 0) {
-        // disable parallelism when there is a network limit.
-        return 1;
-    }
-
-    return max;
+    // this will be parallelised to 100 by hardMaximumActiveJob for files < 100kB
+    return 50;
 }
 
 int OwncloudPropagator::hardMaximumActiveJob()