Log Message:
www/ruby-loofah: update to 2.2.3

## 2.2.3 / 2018-10-30

### Security

Address CVE-2018-16468: Unsanitized JavaScript may occur in sanitized output \ 
when a crafted SVG element is republished.

This CVE's public notice is at https://github.com/flavorjones/loofah/issues/154

## Meta / 2018-10-27

The mailing list is now on Google Groups \ 
[#146](https://github.com/flavorjones/loofah/issues/146):

* Mail: loofah-talk@googlegroups.com
* Archive: https://groups.google.com/forum/#!forum/loofah-talk

This change was made because librelist no longer appears to be maintained.