This commit adds all the missing includes when the PCH header is not used.
Also, some includes are reordered and/or made consistent (e.g. "#include <QtEndian>" -> "#include <QtCore/QtEndian>").
According to Qt's documentation the PCH header doesn't need to be included.
From https://doc.qt.io/qt-5/qmake-precompiledheaders.html:
"To make your project use precompiled headers, you only need to define the PRECOMPILED_HEADER variable in your project file."
"qmake will handle the rest, to ensure the creation and use of the precompiled header file. You do not need to include the precompiled header file in HEADERS, as qmake will do this if the configuration supports precompiled headers."
Also updates TestFFDHE to exercise the new method (and, in doing so,
refactors the tests a bit).
The core check logic from exercise() is moved into a tryFFDHELookupByName
function, which is now used by both the exercise() test, as well as the
namedGroupsMethod() test that is added by this commit.
This commit adds a new class that gives access to the
Diffie-Hellman parameters from RFC 7919.
The class exposes a static function, PEMForNamedGroup, which
looks up a set of Diffie-Hellman parameters in PEM form by
the name used in RFC 7919.
For example, to get the PEM form of 'ffdhe2048', you would
call
QByteArray pem = FFDHE::PEMForNamedGroup(QLatin1String("ffdhe2048"));
With that in hand, you can pass the returned PEM data to
QSslDiffieHellmanParameters to construct an object that can be set
on a QSslSocket-based TLS server.
