Broken link in docs to Xerox regex

[electric-coder]

In the fomafst's main page the following link is broken, under the Features heading:

Features

• Xerox-compatible regular expression and scripting syntax (xfst/lexc)

The link has been broken since before 2019, here's an older working link from the waybackmachine. If someone reading this can suggest a better page that's currently working it might be useful.