* Change Depends and Build-Depends on x-dev to x11proto-core-dev.
* Install headers to /usr/include/X11, not /usr/X11R6/include/X11.
* Pre-Depends: x11-common (>= 1:1.09).
* Change Depends and Build-Depends on x-dev to x11proto-core-dev.
* Install headers to /usr/include/X11, not /usr/X11R6/include/X11.
* Pre-Depends: x11-common (>= 1:1.09).