Old project page is gone

[jwilk]

README says:

old project page is still available at http://pinfo.sourceforge.net/.

But apparently that page is gone now; it unhelpfully redirects to https://sourceforge.net/directory/development/editors-documentation/.

[skull-squadron]

Maybe replace with https://web.archive.org/web/20170426105123/http://pinfo.sourceforge.net/