rtTestXmlStart: fix.


git-svn-id: http://www.virtualbox.org/svn/vbox/trunk@46333 cfe28804-0f27-0410-a406-dd0f0b0b656f
VMMDevTesting: Close the testing instance on VMMDEV_TESTING_CMD_TERM.

git-svn-id: http://www.virtualbox.org/svn/vbox/trunk@46334 cfe28804-0f27-0410-a406-dd0f0b0b656f
GuestHost/SharedClipboard/X11: some separation of logic and host API.

git-svn-id: http://www.virtualbox.org/svn/vbox/trunk@46335 cfe28804-0f27-0410-a406-dd0f0b0b656f