Beta-testing version of 5.4.3

[Ethan A M. <me...@uw...>]

I have placed a tarball for a beta-test version of gnuplot 5.4.3 on SourceForge.
Please report any problems or requests for inclusion by the end of this year.

There is nothing special in this minor release. Mostly small fixes to
individual terminals, configuration of byte-array data for little-endian
platforms, and a few items back-ported from the development version.
For a slightly more complete list of changes see the Release Notes.

  https://sourceforge.net/projects/gnuplot/files/gnuplot/testing/gnuplot-5.4.3beta.tar.gz

My plan is to put out the 5.4.3 release version in the first week of January.

	happy gnuplotting,

		Ethan