- updated to 2.51
- fixed rt.cpan.org#77667 which resulted in invalid configs
written to file when using save_file() and a named block,
whose 2nd part starts with a /.
- fixed rt.cpan.org#64169 by applying patch by Dulaunoy Fabrice.
adds -NoEscape switch which turns off escaping of anything.
- implemented suggestion of rt.cpan.org#67564 by adding 3 new
parameters: -NormalizeOption, -NormalizeBlock and -NormalizeValue,
which take a subroutine reference and change the block,
option or value accordingly.

- fixed rt.cpan.org#65860+76953 undefined value error. (forwarded request 177288 from coolo)