rename octave::build_env namespace from octave::config * build-env-features.sh: Rename from ocgt-conf-features.sh. Update for new names. * build-env.h: Rename from oct-conf.h. Also declare features function. * build-env.in.cc: Rename from oct-conf.in.cc. * oct-conf-features.h: Delete. * libinterp/module.mk: Update. * toplev.cc, __init_gnuplot__.cc, octave.cc: Update for new names.

# script_nest.m
function x = script_nest
  A (5)
  function A (n)
    if n <= 0
      script_nest_script;
    else
      A (n - 1);
    endif
  endfunction
endfunction