The "vnc" SPU and the "replicate" SPU have different external requirements: both require VNC libraries and headers, but only the "vnc" SPU requires the Xcliplist.h headers.
The "vnc" SPU and the "replicate" SPU have different external
requirements: both require VNC libraries and headers, but only the
"vnc" SPU requires the Xcliplist.h headers.

Splitting the USE_VNC directive into USE_VNC and USE_REPLICATE to allow
the "replicate" SPU to be built on systems that don't fulfill the requirements
for USE_VNC.

rpavlik/chromium,rpavlik/chromium,rpavlik/chromium,rpavlik/chromium,rpavlik/chromium