Make it compile with openssl 1.0.0d, gcc 4.6

Make it compile with openssl 1.0.0d, gcc 4.6

SSL_ctrl's prototype has changed slightly in openssl 1.0.0x - the 4th
argument is now a void* as opposed to a const void*.
gcc 4.6 doesn't allow this as an implicit cast.

Merge-request: 1239
Reviewed-by: Peter Hartmann <peter.hartmann@nokia.com>
(cherry picked from commit 007f01a7e801d5409708e4b8de8b3ead1481cf7d)

Change-Id: I4f41af981cf0762383b3fc867ec5d726e2b1e5c6
Reviewed-on: http://codereview.qt.nokia.com/821
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Peter Hartmann <peter.hartmann@nokia.com>