Add option to ignore malformed document on parsing.

Signed-off-by: Toha <tohenk@yahoo.com>
Update tree dumper option.

Signed-off-by: Toha <tohenk@yahoo.com>
Update replace test stuffs.

Signed-off-by: Toha <tohenk@yahoo.com>
Fix hex control encoding.

Signed-off-by: Toha <tohenk@yahoo.com>
Configurable special group.

Signed-off-by: Toha <tohenk@yahoo.com>