Augment the -T handling:

Augment the -T handling:
 * Add --null option (sort #defines here)
 * Add process_lines function to util.c that reads newline-terminated
   or null-terminated lines (with self-sizing buffers, etc) and iteratively
   invokes a provided function.  Use this to dramatically simplify:
   -T handling for -c, --exclude-from-file, and --include-from-file.
 * Add -T handling to -x (via include_from_file)

Hopefully, this will fix the openoffice port and a couple of
others that rely on -T and --null.