Remove SSL includes from qhttpnetworkconnection_p.h

On Windows, qsslcontext_openssl_p.h pulls in an unsanitized
windows.h, causing the infamous min/max macros to be defined,
requiring a #define NOMINMAX in qhttp2protocolhandler.cpp.

This in turn breaks the MinGW developer build since that has
NOMINMAX globally defined:

access\qhttp2protocolhandler.cpp:40:0: error: "NOMINMAX" redefined [-Werror]

Remove the include, adding missing forward declarations and include
directives to the source files.

Change-Id: Ic1c2c711d87599b15ad6e2d87eae7153a44ace47
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@theqtcompany.com>

src/network/access/qhttp2protocolhandler.cpp

@@ -37,8 +37,6 @@
 **
 ****************************************************************************/
 
-#define NOMINMAX
-
 #include "qhttpnetworkconnection_p.h"
 #include "qhttp2protocolhandler_p.h"
 

src/network/access/qhttpnetworkconnection.cpp

@@ -60,6 +60,7 @@
 #    include <QtNetwork/qsslkey.h>
 #    include <QtNetwork/qsslcipher.h>
 #    include <QtNetwork/qsslconfiguration.h>
+#    include <QtNetwork/qsslerror.h>
 #endif
 
 

src/network/access/qhttpnetworkconnection_p.h

@@ -72,17 +72,6 @@
 
 #ifndef QT_NO_HTTP
 
-#ifndef QT_NO_SSL
-#ifndef QT_NO_OPENSSL
-#    include <private/qsslcontext_openssl_p.h>
-#endif
-#    include <private/qsslsocket_p.h>
-#    include <QtNetwork/qsslsocket.h>
-#    include <QtNetwork/qsslerror.h>
-#else
-#   include <QtNetwork/qtcpsocket.h>
-#endif
-
 QT_BEGIN_NAMESPACE
 
 class QHttpNetworkRequest;
@@ -90,6 +79,10 @@ class QHttpNetworkReply;
 class QHttpThreadDelegate;
 class QByteArray;
 class QHostInfo;
+#ifndef QT_NO_SSL
+class QSslConfiguration;
+class QSslContext;
+#endif // !QT_NO_SSL
 
 class QHttpNetworkConnectionPrivate;
 class Q_AUTOTEST_EXPORT QHttpNetworkConnection : public QObject

src/network/access/qhttpnetworkconnectionchannel.cpp

@@ -52,6 +52,7 @@
 #include <private/qspdyprotocolhandler_p.h>
 
 #ifndef QT_NO_SSL
+#    include <private/qsslsocket_p.h>
 #    include <QtNetwork/qsslkey.h>
 #    include <QtNetwork/qsslcipher.h>
 #    include <QtNetwork/qsslconfiguration.h>