3.1.0.78 xlib

The `xlib` terminal driver supports the X11 Windows System. It generates gnuplot_x11 commands, but sends them to the output file specified by `set output '<filename>'`. `set term x11` is equivalent to `set output "|gnuplot_x11 -noevents"; set term xlib.` `xlib` takes the same set of options as `x11`."