message: Allow h1 and h2 tags again. CSS handled by riot-web
diff: @@ -111,8 +111,7 @@ var sanitizeHtmlParams = {
  allowedTags: [
  'font', // custom to matrix for IRC-style font coloring
  'del', // for markdown
  - // deliberately no h1/h2 to stop people shouting.
  - 'h3', 'h4', 'h5', 'h6', 'blockquote', 'p', 'a', 'ul', 'ol',
  + 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'blockquote', 'p', 'a', 'ul', 'ol',
  'nl', 'li', 'b', 'i', 'u', 'strong', 'em', 'strike', 'code', 'hr', 'br', 'div',
  'table', 'thead', 'caption', 'tbody', 'tr', 'th', 'td', 'pre', 'span',
  ],
  @@ -165,12 +164,6 @@ var sanitizeHtmlParams = {
  attribs.rel = 'noopener'; // https://mathiasbynens.github.io/rel-noopener/
  return { tagName: tagName, attribs : attribs };
  },
  - 'h1': function(tagName, attribs) {
  - return { tagName: 'h3', attribs: attribs };
  - },
  - 'h2': function(tagName, attribs) {
  - return { tagName: 'h3', attribs: attribs };
  - },
  '*': function(tagName, attribs) {
  // Delete any style previously assigned, style is an allowedTag for font and span
  // because attributes are stripped after transforming
  