HTML.MaxImgLength TYPE: int/null DEFAULT: 1200 VERSION: 3.1.1 --DESCRIPTION--
 This directive controls the maximum number of pixels in the width and
 height attributes in img tags. This is
 in place to prevent imagecrash attacks, disable with null at your own risk.
 This directive is similar to %CSS.MaxImgLength, and both should be
 concurrently edited, although there are
 subtle differences in the input format (the HTML max is an integer).