Log Message:
gnuplot: updated to 5.2.4

Changes in 5.2.4
* NEW "call" parameters ARG1, ARG2, ... are also present as \ 
ARGV[1]...ARGV[ARGC]
* CHANGE generalize the test for missing data flag in input data
* CHANGE "set []range writeback" is now essentially always in effect
* CHANGE consistent placement of timestamp at true bottom of page
* FIX spurious evaluation of logscale coordinates as UNDEFINED
* FIX column header title assignments for histogram with errorbars
* FIX re-implement "refresh" command to use autoscale writeback/restore
* FIX font-handling bug; line-spacing of previous font still in effect
* FIX post, svg, dumb terminals: early fontsize initialization

Changes in 5.2.3
* NEW "set grid {no}vertical" adds grid lines in the xz and xz planes
* NEW "set cntrparam {firstlinetype N} {{un}sorted}"
* CHANGE drop non-working support for YIQ color space
* CHANGE expand \n characters when printing into a datablock
* CHANGE allow contour plots to opt out of hidden3d processing
* CHANGE special-case code to speed up handling of logscale axes
* CHANGE do not write GPFUN_* variables to "save" output file
* CHANGE default to density 100 for "set fs solid", 50 for "set \ 
fs transparent"
* FIX potential buffer overflow in gprintf formats containing %%
* FIX immediate response to ctrl-Z when libreadline is used for input
* FIX warning messages inside a bracketed clause could trigger early exit
* FIX tweak logscale tic range limits and minor tic generation intervals
* FIX stats FOO using 'namedcolumn' name columnhead
* FIX clipping of INRANGE->UNDEFINED line segments
* FIX use of logscale y axis in "set view map" or "set pm3d \ 
map" modes
* FIX placement of colorbox in "set view map" mode
* FIX autoscaled axis range of logscale axes in "set view map" mode
* FIX polar mode "with yerrorbars" error bars are radial, not vertical
* FIX clipping of circles whose center is offscreen to the left or bottom
* FIX snap to x=zero for function plot sampling does not apply to logscale x
* FIX canvas terminal: apply both color and alpha channel to points and lines
* FIX svg terminal: apply current color to dots
* FIX qt terminal: include "notitle" plots in accounting for toggle \ 
operations
* FIX svg terminal: point plot empty title produced spurious mousing directive
* FIX tikz terminal: failed to recognize dashtype 1

Changes in 5.2.2
* NEW set table separator {tab|comma|"char"} allows creation of csv files
* NEW hotkey for changing azimuth in 3D plots with mousing
* NEW splot ... with lines title at {beg|end}
* NEW Rework gstrptime() to handle relative time formats tH tM tS
* NEW command "set rgbmax <value>" controls interpretation of \ 
input RGB values
* FIX allow mixed use of in-key plot titles and manually placed titles
* FIX prevent runaway iterations of the form   plot for [i=start:*] ...
* FIX handle in-line range limits for linked or nonlinear axes
* FIX restore pre-5.2 interpretation of logscaled tic increment as a multiplier
* FIX logscale tic placement is closer to that of versions before 5.2.0
* FIX recheck inrange/outrange points after spline or bezier smoothing
* FIX autoscaling of plots with linked axes where data is plotted on x2 or y2
* FIX sampling on x2 if linked to x1;  e.g. plot sample [t=1:5:1] '+' axes x2y1
* FIX empty range on logscale y axis is handled by auto-extending the range
* FIX autoscaling xrange of stacked histograms