lib/web/README: Moved the example config

It's a long text, so it's better as a separate file.

I couldn't find instructions how to set up lighttpd with wsgi, maybe there
isn't a ready to go solution like there is for Apache.

git-svn-id: http://gar.svn.sourceforge.net/svnroot/gar/csw/mgar/gar/v2@20640 d3b55034-1cff-0310-a425-aefe953e1e90