Add functionality to ping BING

[lewismc]

We can easily ping BING when we generate new sitemap's... this is documented at https://www.bing.com/webmaster/help/how-to-submit-sitemaps-82a15bd4 and I've copied the sentiment below for convenience. We should add similar functionality to how ping'ing works for Google.

Pinging Bing Using a HTTP request

If you have an automated system that generates your sitemap, you may find it easier to inform Bing about your sitemap by sending a HTTP request. Using your favorite method to send the request, use the following URL, replacing the example with your sitemap location and URL encoding everything behind the sitemap parameter:

http://www.bing.com/ping?sitemap=http%3A%2F%2Fwww.example.com/sitemap.xml

The server will respond with HTTP Status 200 (OK) if the submission was successful. Unlike the submission options inside Webmaster Tools you will not get any information about the validity about the actual sitemap itself.

noteNote
If you’d like more programmatic flexibility consider using the Bing Webmaster API and its methods to submit and get details about sitemaps.