Log message:
www/ruby-loofah: update to 2.2.2

## 2.2.2 / 2018-03-22

Make public `Loofah::HTML5::Scrub.force_correct_attribute_escaping!`,
which was previously a private method. This is so that downstream gems
(like rails-html-sanitizer) can use this logic directly for their own
attribute scrubbers should they need to address CVE-2018-8048.

Log message:
www/ruby-loofah: update to 2.2.1

## 2.2.1 / 2018-03-19

Addresses CVE-2018-8048. Loofah allowed non-whitelisted attributes to be present \ 
in sanitized output when input with specially-crafted HTML fragments.

This CVE's public notice is at https://github.com/flavorjones/loofah/issues/144

Log message:
www/ruby-loofah: update to 2.2.0

## 2.2.0 / 2018-02-11

Features:

* Support HTML5 `<main>` tag. #133 (Thanks, @MothOnMars!)
* Recognize HTML5 block elements. #136 (Thanks, @MothOnMars!)
* Support SVG `<symbol>` tag. #131 (Thanks, @baopham!)
* Support for whitelisting CSS functions, initially just `calc` and `rgb`. \ 
#122/#123/#129 (Thanks, @NikoRoberts!)
* Whitelist CSS property `list-style-type`. #68/#137/#142 (Thanks, \ 
@andela-ysanni and @NikoRoberts!)

Bugfixes:

* Properly handle nested `script` tags. #127.

## 2.1.1 / 2017-09-24

Bugfixes:

* Removed warning for unused variable. #124 (Thanks, @y-yagi!)

## 2.1.0 / 2017-09-24

Notes:

* Re-implemented CSS parsing and sanitization using the \ 
{crass}[https://github.com/rgrove/crass] library. #91

Features:

* Added :noopener HTML scrubber (Thanks, @tastycode!)
* Support `data` URIs with the following media types: text/plain, text/css, \ 
image/png, image/gif, image/jpeg, image/svg+xml. #101, #120. (Thanks, \ 
@mrpasquini!)

Bugfixes:

* The :unprintable scrubber now scrubs unprintable characters in CDATA nodes \ 
(like `<script>`). #124
* Allow negative values in CSS properties. Restores functionality that was \ 
reverted in v2.0.3. #91

Log message:
Import ruby-loofah-2.0.3 as www/ruby-loofah

Loofah is a general library for manipulating and transforming HTML/XML
documents and fragments. It's built on top of Nokogiri and libxml2, so
it's fast and has a nice API. Loofah excels at HTML sanitization (XSS
prevention). It includes some nice HTML sanitizers, which are based on
HTML5lib's whitelist, so it most likely won't make your codes less
secure.