Merge pull request #658 from jtatum/special-comments-readme

Document KeepSpecialComments option

README.md

@@ -198,7 +198,7 @@ The HTML5 minifier uses these minifications:
 
 Options:
 
-- `KeepConditionalComments` preserve all IE conditional comments such as `<!--[if IE 6]><![endif]-->` and `<![if IE 6]><![endif]>`, see https://msdn.microsoft.com/en-us/library/ms537512(v=vs.85).aspx#syntax
+- `KeepSpecialComments` preserve all special comments, including Server Side Includes such as `<!--#include file="header.html" -->` and IE conditional comments such as `<!--[if IE 6]><![endif]-->` and `<![if IE 6]><![endif]>`, see https://msdn.microsoft.com/en-us/library/ms537512(v=vs.85).aspx#syntax
 - `KeepDefaultAttrVals` preserve default attribute values such as `<script type="application/javascript">`
 - `KeepDocumentTags` preserve `html`, `head` and `body` tags
 - `KeepEndTags` preserve all end tags