.htaccess: Support for Apache 2.X

Support Apache 2.X rewrite rule.

    Apache changed regex engines when it changed versions, so Apache
    version 1 requires the leading slash while Apache 2 forbids it!
    http://www.sitepoint.com/apache-mod_rewrite-examples/

Thanks to a comment on:
http://tech.nitoyon.com/ja/blog/2013/10/29/d3js-svg-line/
redirector: Add timeout feature