Perl_pp_stat() in pp_sys.c implements Perl stat()
    calls PerlLIONameStat()
      calls win32_stat()
	    calls stat(path, sbuf) // Win32 library call
		  sbuf.st_mode == 0100777 octal, for perl.exe, GOOD

  Perl_pp_fttext() in pp_sys.c implements Perl -T 
    calls PerlLIOFileStat()
	  calls win32_fstat()
	    calls my_fstat()
		  calls fstat(fd, sbuf)  // Win32 library call
		    sbuf.st_mode == 0100666 octal, for perl.exe, BAD