Calling peek() for qsslsocket caused socket data to be copied into
qiodevices buffer and therefore make it unaccessible in qsslsocket.
Cherry picked form 4.8-branch & modified to Qt5 API changes
(int -> qintptr)
Original commits:
commit 621f18955082fc73471e75d1f8c35c2dcd4befeb
Author: Shane Kearns <ext-shane.2.kearns@nokia.com>
commit 68b1d5c17aa38d5921bdade2b0e0cb67c6c90513
Author: Kalle Viironen <kalle.viironen@digia.com>
Task-number: QTBUG-18498
Change-Id: I6be4b19baec2f3197537f5e7b61432040ec84ad2
Reviewed-by: Shane Kearns <shane.kearns@accenture.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>