Now having
* sanitize: run the sanitizer to clean the html (removing javascripts,
unwanted tags, ...)
* sanitize_tags: only a subset of tags is allowed in html content.
Unwelcomed tags are remove dand their content stripped.
* sanitize_attributes: only a subset of attributes is allowed.
* sanitize_style: only a subset of style attributes is allowed. Style
attributes are parsed to keep only a white list.
* strip_style: all style is removed. It bypasses sanitize_style as there
is no need to sanitize something that is removed.
* strip_classes: remove class attributes
Fields parameters have also been updated to match the sanitize options. Html
fields by default are sanitized with sanitize_tags activated but without any
further options. All addons have been updated to match the new options
according to their previous behavior.