Update the Qt5 ports to 5.6.1.
This took longer than expected, but there are quite a few changes to the
existing ports and a few new ones.
General upstream changes:
- Starting with Qt 5.6.2, Qt will fail at configuration time if LibreSSL is
being used. According to the discussion here:
The Qt project is not opposed to LibreSSL, but does not want to mix
support for it into the OpenSSL backend code, especially as they move
towards supporting OpenSSL 1.1.
People interested in LibreSSL support are welcome to submit a separate
backend upstream, but are expected to maintain it. We (kde@) are not
opposed to carrying some patches authored by others in the future, as long(Only the first 15 lines of the commit message are shown above )