Rename ClipboardServerConnection=>ConnectionToClipboardServer. This was done with CLion's automatic rename feature.
SpiceAgent depends on header files built as part of the Clipboard target.
A SPICE agent communicates with the host OS to provide nifty features like clipboard sharing :^) This patch implements only plain-text clipboard sharing. See: github.com/freedesktop/spice-protocol/blob/master/spice/vd_agent.h