HTTP header may be damaged

"HTTP/1.1 100 CONTINUE\r\n"
If the header from a server is splitted between two packets the first packet contains "HTTP/1.1 100" and the second one contains " CONTINUE\r\n", one space (0x20) is skipped. After processing the line looks in this way "HTTP/1.1 100CONTINUE".
QHttpNetworkReplyPrivate::readStatus(QAbstractSocket *socket) function is called twice, if a http header is splitted as above. The function always removes whitespace from the beginning of a packet, even if it is the second part of a http header.

This causes connection error (QNetworkReply::RemoteHostClosedError).

I found the bug when I used https connection.
A patch is included.