- Update to gnuplot 5.4.6
* NEW set key {columns }
set key {keywidth }
* NEW XDG support
startup file: $XDG_CONFIG_HOME/gnuplot/gnuplotrc
history file: $XDG_STATE_HOME/gnuplot_history
wxt configuration: $XDG_CONFIG_HOME/gnuplot/gnuplot-wxt.conf
* CHANGE remove "alldoc" build target
* CHANGE plot with polygons fillstyle empty really does mean empty
* FIX windows: various problems mixing piped input and stdin Bug #2491
* FIX x11: bad interactions of lt nodraw, bgnd and dash pattern Bug #2572
* FIX wxt: export-to-file widget should preserve line properties
* FIX svg: set initial default fill to "none"
* FIX png: back-compatibility with very old versions of gdlib Bug #2579
* FIX variable pointtype, pointsize in plot style yerrorlines
* FIX border color for polygons with variable fillcolor
* FIX definition followed by iteration in a plot command Bug #2580
* FIX parametric plot with filledcurves y1= Bug #1797
- Port patches
* Gnuplot_5_4.pdf
* gnuplot-4.6.0-demo.diff
* gnuplot-4.6.0-fonts.diff
* gnuplot-4.6.0.dif
* gnuplot-5.4.4-grep.patch
* gnuplot-PIE.patch
* gnuplot-gd.patch

- Update to gnuplot 5.4.6
* NEW set key {columns }