code: function(hljs) {
    var NUMBER = {className: 'number', begin: '[\\$%]\\d+'};
    return {
      aliases: ['apacheconf'],
      case_insensitive: true,
      contains: [
        hljs.HASH_COMMENT_MODE,
        {className: 'tag', begin: '</?', end: '>'},
        {
          className: 'keyword',
          begin: /\w+/,
          relevance: 0,
          // keywords aren’t needed for highlighting per se, they only boost relevance
          // for a very generally defined mode (starts with a word, ends with line-end
          keywords: {
            common:
              'order deny allow setenv rewriterule rewriteengine rewritecond documentroot ' +
              'sethandler errordocument loadmodule options header listen serverroot ' +
              'servername'
          },
          starts: {
            end: /$/,
            relevance: 0,
            keywords: {
              literal: 'on off all'
            },
            contains: [
              {
                className: 'sqbracket',
                begin: '\\s\\[', end: '\\]$'
              },
              {
                className: 'cbracket',
                begin: '[\\$%]\\{', end: '\\}',
                contains: ['self', NUMBER]
              },
              NUMBER,
              hljs.QUOTE_STRING_MODE
            ]
          }
        }
      ],
      illegal: /\S/
    };
  }
docs: /*
  Language: Apache
  Author: Ruslan Keba <rukeba@gmail.com>
  Contributors: Ivan Sagalaev <maniac@softwaremaniacs.org>
  Website: http://rukeba.com/
  Description: language definition for Apache configuration files (httpd.conf & .htaccess)