mark top of faq as obsolete, and point to real faq url

svn:r3135

doc/FAQ

@@ -1,3 +1,7 @@
+[This file is obsolete. Check out the online FAQ at the wiki
+for more accurate and complete questions and answers:
+http://wiki.noreply.org/wiki/TheOnionRouter/TorFAQ
+
 The Onion Routing (TOR) Frequently Asked Questions
 --------------------------------------------------