QSslSocket errors
===

In Qt 4.8 on Windows 7 Ultimate x64, when I try to use `QNetworkAccessManager` to `post()` something over the network:

    _net_acc_mgr.post(QNetworkRequest(QUrl(...)),
                      QByteArray(...));

I encounter the following run time errors:

    QSslSocket: cannot resolve OPENSSL_add_all_algorithms_noconf
    QSslSocket: cannot resolve OPENSSL_add_all_algorithms_conf
    QSslSocket: cannot call unresolved function OPENSSL_add_all_algorithms_noconf
    content-type missing in HTTP POST, defaulting to application/octet-stream

I clearly remember the same code worked couple of years ago. But I forget which version of Qt I tried.

Is there anything else require to work with `QNetworkAccessManager` in Qt 4.8?