What's “any-link” pseudoclass for?

[neoobs]

I don't know if it's a part of a standard, but at least two major browsers has implemented it:

• \[code\]:-webkit-any-link\[/code\] in Chrome
• \[code\]:-moz-any-link\[/code\] in Firefox

I can't find any documentation for it. I would like to know it's purpose, browser support, and examples of usage.