Implement scaling of remote desktop for VNC protocol.
Allows up- and downscaling with free ascpect ratio.
There are sometimes small roundig errors, what results small artefacts (KDE 3 version had this issue too). Need to find a solution for this issue later, but this implementation is already usable without problems. This is still work in progress,; fixes for small problems will follow.
BUG:151519
FEATURE:148214
FEATURE:151099
git-svn-id: svn://anonsvn.kde.org/home/kde/trunk/KDE/kdenetwork@789489 283d02a7-25f6-0310-bc7c-ecb5cbfe19da