Added a test program and profiling for messages.
Stewart Brodie authored
Detail:
  The kernel can now disable all substitutions into error messages that
    it generates and count the number of times each error is looked up.
    The ErrorCount BASIC program then displays that information so that
    you can see if any odd errors are occurring or weird errors that you
    would not be expecting.
  It is not sensible to build a release with countmsgusage enabled.
Admin:
  Tested in Ursula build.

Version 5.32. Not tagged
5951aeb5