Update kf5options manpage docbook
Review Request #127903 - Created May 13, 2016 and submitted
replace the obsolete content with updates
Use case for option desktopfile borrowed von Martin Gräßlins commit log
See Also: qt5options - does that really make sense for a kf5 app?
I really doubt that the qt5options manpage is uptodate
Generic options for Qt5 (so qt5options) do work for every Qt5 application, including of course the ones that also use Frameworks. This can go in with few changes.