in some build environments the use of std::transform() with plain pointers as
input iterators results in many warnings about how unsafe such a construct is.
The warnings could be suppressed e.g. on MSVC with the SCL_SECURE_NO_WARNINGS
define. Open coding the construct makes it cleaner and more debugable though.
(cherry picked from commit a599e524)

Conflicts:
	comphelper/inc/comphelper/namedvaluecollection.hxx

Change-Id: I3233116bfb862f6cda038541ffecac492623611c