Retire SPDY protocol implementation (Qt6)

As it was superseded by HTTP/2. Bye, Speedy. Since it's Qt 6,
we also fix the attribute's enumerator to fit our coding
convention with HTTP2AllowedAttribute becoming Http2AllowedAttribute,
and the same for HTTP2WasUsedAttribute.

tst_qnetworkreply in 'benchmark' directory of qtbase/tests
was updated - we have the logic they tested in preConnectEncrypted
in tst_http2 now.

Manual qnetworkreply test was updated (instead of SPDY in NPN failure
we can use H2, the second test was deleted - again, auto-tested in
tst_http2).

Change-Id: I559c140c333ddf72664911c6e275b1d0d2b980a9
Task-number: QTBUG-78255
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

1 files changed, 3 insertions, 5 deletions

diff --git a/src/network/access/qnetworkaccessmanager.cpp b/src/network/access/qnetworkaccessmanager.cpp
index 76b95b5823..125427493d 100644
--- a/src/network/access/qnetworkaccessmanager.cpp
+++ b/src/network/access/qnetworkaccessmanager.cpp
@@ -1237,12 +1237,10 @@ void QNetworkAccessManager::connectToHostEncrypted(const QString &hostName, quin
     if (sslConfiguration != QSslConfiguration::defaultConfiguration())
         request.setSslConfiguration(sslConfiguration);
 
-    // There is no way to enable SPDY/HTTP2 via a request, so we need to check
-    // the ssl configuration whether SPDY/HTTP2 is allowed here.
+    // There is no way to enable HTTP2 via a request, so we need to check
+    // the ssl configuration whether HTTP2 is allowed here.
     if (sslConfiguration.allowedNextProtocols().contains(QSslConfiguration::ALPNProtocolHTTP2))
-        request.setAttribute(QNetworkRequest::HTTP2AllowedAttribute, true);
-    else if (sslConfiguration.allowedNextProtocols().contains(QSslConfiguration::NextProtocolSpdy3_0))
-        request.setAttribute(QNetworkRequest::SpdyAllowedAttribute, true);
+        request.setAttribute(QNetworkRequest::Http2AllowedAttribute, true);
 
     request.setPeerVerifyName(peerName);
     get(request);