Add a FAQ about running svnserve as a service on Windows, fixing issue #1559.
Add a FAQ about running svnserve as a service on Windows, fixing
issue #1559.

* www/faq.html: Well, do just that.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion