Bing Result Rewrite

Bing has taken to obfuscating their search results.

Example: `https://www.bing.com/fd/ls/GLinkPing.aspx?IG=9AFD7A29FFBB46F1B9A81FF058C0640E&&ID=SERP,5206.1&url=https%3A%2F%2Fwww.bing.com%2Fck%2Fa%3F!%26%26p%3D0d3eae76a1129f5f677a93348d0d5d6ee2f5906c36c38d0cad86b467db7afa8aJmltdHM9MTY1MjkzNTY0NSZpZ3VpZD05YWZkN2EyOS1mZmJiLTQ2ZjEtYjlhOC0xZmYwNThjMDY0MGUmaW5zaWQ9NTIwNg%26ptn%3D3%26fclid%3Dc74e5d8f-d72e-11ec-a4f0-c181b1119cc1%26u%3Da1aHR0cHM6Ly93d3cueW91dHViZS5jb20vd2F0Y2g_dj1YSHp0a0ZDemJUVQ%26ntb%3D1`

Becomes: `https://www.bing.com/ck/a?!&&p=db4b3ebd2e9cc9b2ea00045df2468659404c3b0196457cff9450c3c8c5a7e73dJmltdHM9MTY1MjkxMTQ0MiZpZ3VpZD0yMGZhZDE5My0zNTMxLTRiNWEtOGFmOC1mYzdiODUyODRlOTEmaW5zaWQ9NTIyMA&ptn=3&fclid=6cea1929-d6f6-11ec-8509-a5dffd6b7157&u=a1aHR0cHM6Ly93d3cueW91dHViZS5jb20vd2F0Y2g_dj1YSHp0a0ZDemJUVQ&ntb=1`

Should be: `https://www.youtube.com/watch?v=XHztkFCzbTU`

The section halfway through the `p` variable to the end is base64-encoded, `&imts=1652911442&iguid=20fad193-3531-4b5a-8af8-fc7b85284e91&insid=5220`. They're stepping up their crap. Just strip the first two characters of the `u` paramater and the rest, `HR0cHM6Ly93d3cueW91dHViZS5jb20vd2F0Y2g_dj1YSHp0a0ZDemJUVQ`is the URL base64-encoded. :)

Edit: I know it's a bit beyond the scope of Clean Link's typical parameter allow/block-listing, but I think it'd be helpful to evolve it?

Start by tracing the existing link-cleaning parameter allow/block-list handling and compare it with the Bing examples in this issue. The work is done when Bing redirect URLs are reduced to the genuine destination, such as the decoded YouTube URL, without breaking existing link-cleaning behavior.

Written by the indexing model from the issue text.