Extended build script for the new Fortran 2023 check programs.
Commit a fresh set of checking programs, focusing on the Fortran 2023 standard
Apply the last patch by Rafael: non-interactive options for testing Octave
Apply patches by Rafael Laboissiere:
Add a routine to check for the Fortran 2018 feature that routines are recursive by default.
Building_PLplot_with_a_cross-compiler
Updated documentation, test program, parser and auxiliary program
Initial import