Added QAsn1Element

This element can be used for backends that do not offer all the
information that is needed when implementing a ssl certificate backend.
WinRT and the SecureTransport lack functionality in this area for
example.

The sources and tests are added for ssl and openssl configurations in order
to be tested. The condition for adding these can be changed as soon
as they are used by an actual implementation

Change-Id: I2b836133105afdc178bf3b1ee7d732bea069effa
Reviewed-by: Andrew Knight <andrew.knight@digia.com>
standardize QPA input event logging category hierarchy

If qtlogging.ini contains a rule
qt.qpa.input*=true
then all available input event logging will be enabled on any platform.
There are more specific categories for touch, tablet, gestures,
input methods etc. on some platforms.

Change-Id: I8754ce23df8f0b750a4b7dfcf3afe5bab800ead8
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Use std::vector range ctor in QVector::toStdVector()

There are three reasons to do so:

1. This could be more efficient, depending on the STL implementation.

2. By using QTypedArrayData iterators (T*) instead of QVector ones,
   we actually invoke the non-templated range ctor of std::vector,
   at least in the common case that std::vector<T>::const_iterator
   is also const T*.

3. The change turns a former NRVO return into a RVO one, potentially
   allowing more compilers to perform the copy elision.

Change-Id: I70b35aaeae70ba06a971a36b8b1b1da997e8094f
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>