Fix binary incompatibility between openssl versions

Fix binary incompatibility between openssl versions

OpenSSL changed the layout of X509_STORE_CTX between 0.9 and 1.0
So we have to consider this struct as private implementation, and use
the access functions instead.

This bug would cause certificate verification problems if a different
version of openssl is loaded at runtime to the headers Qt was compiled
against.

Task-number: QTBUG-28343
Change-Id: I47fc24336f7d9c80f08f9c8ba6debc51a5591258
Reviewed-by: Richard J. Moore <rich@kde.org>
(cherry picked from commit eb2688c4c4f257d0a4d978ba4bf57d6347b15252)

Gbp-Pq: Name Fix_binary_incompatibility_between_openssl_versions.patch